Add build process to slice the lambda background for the game launcher #1

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opened 2026-04-21 07:28:30 +00:00 by AmbientImpact · 0 comments

AmbientImpact commented

2026-04-21 07:28:30 +00:00

(Migrated from codeberg.org)

ImageMagick seems to be able to get us most of the way there with:

https://usage.imagemagick.org/crop/#crop_equal

Current progress

However, after a lot of trial and error with getting the correct image format and other details, I'm stuck with the game appearing to flip the images within the rows like so:

Note how they seem to be in the correct rows and columns, but the squares are flipped vertically.

Running magick identify -verbose on one of our own files gives me:

Image:
  Filename: /home/ambientimpact/Gaming/Half-Life/unforeseen-consequences/assets/build/resource/background/32_9_3072_512.tga
  Permissions: rw-r--r--
  Format: TGA (Truevision Targa image)
  Class: DirectClass
  Geometry: 256x256+0+0
  Units: Undefined
  Colorspace: sRGB
  Type: Grayscale
  Base type: Undefined
  Endianness: Undefined
  Depth: 8-bit
  Channels: 3.0
  Channel depth:
    Red: 8-bit
    Green: 8-bit
    Blue: 8-bit
  Channel statistics:
    Pixels: 65536
    Red:
      min: 0  (0)
      max: 182 (0.713725)
      mean: 45.2527 (0.177462)
      median: 40 (0.156863)
      standard deviation: 28.6463 (0.112338)
      kurtosis: 0.608275
      skewness: 0.850975
      entropy: 0.896463
    Green:
      min: 0  (0)
      max: 182 (0.713725)
      mean: 45.2527 (0.177462)
      median: 40 (0.156863)
      standard deviation: 28.6463 (0.112338)
      kurtosis: 0.608275
      skewness: 0.850975
      entropy: 0.896463
    Blue:
      min: 0  (0)
      max: 182 (0.713725)
      mean: 45.2527 (0.177462)
      median: 40 (0.156863)
      standard deviation: 28.6463 (0.112338)
      kurtosis: 0.608275
      skewness: 0.850975
      entropy: 0.896463
  Image statistics:
    Overall:
      min: 0  (0)
      max: 182 (0.713725)
      mean: 45.2527 (0.177462)
      median: 40 (0.156863)
      standard deviation: 28.6463 (0.112338)
      kurtosis: 0.608275
      skewness: 0.850975
      entropy: 0.896463
  Colors: 179
  Histogram:
          1331: (0,0,0) #000000 black
           214: (1,1,1) #010101 srgb(1,1,1)
           211: (2,2,2) #020202 srgb(2,2,2)
           328: (3,3,3) #030303 grey1
           247: (4,4,4) #040404 srgb(4,4,4)
           309: (5,5,5) #050505 grey2
           444: (6,6,6) #060606 srgb(6,6,6)
           433: (7,7,7) #070707 srgb(7,7,7)
           416: (8,8,8) #080808 grey3
           535: (9,9,9) #090909 srgb(9,9,9)
           516: (10,10,10) #0A0A0A grey4
           477: (11,11,11) #0B0B0B srgb(11,11,11)
           642: (12,12,12) #0C0C0C srgb(12,12,12)
           570: (13,13,13) #0D0D0D grey5
           627: (14,14,14) #0E0E0E srgb(14,14,14)
           729: (15,15,15) #0F0F0F grey6
           832: (16,16,16) #101010 srgb(16,16,16)
           898: (17,17,17) #111111 srgb(17,17,17)
          1038: (18,18,18) #121212 grey7
           994: (19,19,19) #131313 srgb(19,19,19)
           961: (20,20,20) #141414 grey8
          1047: (21,21,21) #151515 srgb(21,21,21)
          1135: (22,22,22) #161616 srgb(22,22,22)
          1027: (23,23,23) #171717 grey9
          1096: (24,24,24) #181818 srgb(24,24,24)
          1306: (25,25,25) #191919 srgb(25,25,25)
          1169: (26,26,26) #1A1A1A grey10
          1067: (27,27,27) #1B1B1B srgb(27,27,27)
          1108: (28,28,28) #1C1C1C grey11
          1131: (29,29,29) #1D1D1D srgb(29,29,29)
          1041: (30,30,30) #1E1E1E srgb(30,30,30)
          1028: (31,31,31) #1F1F1F grey12
          1026: (32,32,32) #202020 srgb(32,32,32)
           975: (33,33,33) #212121 grey13
           987: (34,34,34) #222222 srgb(34,34,34)
          1025: (35,35,35) #232323 srgb(35,35,35)
           994: (36,36,36) #242424 grey14
           927: (37,37,37) #252525 srgb(37,37,37)
           852: (38,38,38) #262626 grey15
           853: (39,39,39) #272727 srgb(39,39,39)
           840: (40,40,40) #282828 srgb(40,40,40)
           803: (41,41,41) #292929 grey16
           835: (42,42,42) #2A2A2A srgb(42,42,42)
           788: (43,43,43) #2B2B2B grey17
           726: (44,44,44) #2C2C2C srgb(44,44,44)
           794: (45,45,45) #2D2D2D srgb(45,45,45)
           822: (46,46,46) #2E2E2E grey18
           748: (47,47,47) #2F2F2F srgb(47,47,47)
           760: (48,48,48) #303030 grey19
           734: (49,49,49) #313131 srgb(49,49,49)
           760: (50,50,50) #323232 srgb(50,50,50)
           757: (51,51,51) #333333 grey20
           816: (52,52,52) #343434 srgb(52,52,52)
           733: (53,53,53) #353535 srgb(53,53,53)
           693: (54,54,54) #363636 grey21
           700: (55,55,55) #373737 srgb(55,55,55)
           643: (56,56,56) #383838 grey22
           707: (57,57,57) #393939 srgb(57,57,57)
           641: (58,58,58) #3A3A3A srgb(58,58,58)
           638: (59,59,59) #3B3B3B grey23
           588: (60,60,60) #3C3C3C srgb(60,60,60)
           593: (61,61,61) #3D3D3D grey24
           570: (62,62,62) #3E3E3E srgb(62,62,62)
           507: (63,63,63) #3F3F3F srgb(63,63,63)
           573: (64,64,64) #404040 grey25
           540: (65,65,65) #414141 srgb(65,65,65)
           489: (66,66,66) #424242 grey26
           501: (67,67,67) #434343 srgb(67,67,67)
           504: (68,68,68) #444444 srgb(68,68,68)
           527: (69,69,69) #454545 grey27
           446: (70,70,70) #464646 srgb(70,70,70)
           477: (71,71,71) #474747 grey28
           440: (72,72,72) #484848 srgb(72,72,72)
           476: (73,73,73) #494949 srgb(73,73,73)
           441: (74,74,74) #4A4A4A grey29
           413: (75,75,75) #4B4B4B srgb(75,75,75)
           439: (76,76,76) #4C4C4C srgb(76,76,76)
           389: (77,77,77) #4D4D4D grey30
           356: (78,78,78) #4E4E4E srgb(78,78,78)
           375: (79,79,79) #4F4F4F grey31
           372: (80,80,80) #505050 srgb(80,80,80)
           317: (81,81,81) #515151 srgb(81,81,81)
           338: (82,82,82) #525252 grey32
           278: (83,83,83) #535353 srgb(83,83,83)
           299: (84,84,84) #545454 grey33
           307: (85,85,85) #555555 srgb(85,85,85)
           287: (86,86,86) #565656 srgb(86,86,86)
           274: (87,87,87) #575757 grey34
           302: (88,88,88) #585858 srgb(88,88,88)
           253: (89,89,89) #595959 grey35
           248: (90,90,90) #5A5A5A srgb(90,90,90)
           254: (91,91,91) #5B5B5B srgb(91,91,91)
           227: (92,92,92) #5C5C5C grey36
           248: (93,93,93) #5D5D5D srgb(93,93,93)
           210: (94,94,94) #5E5E5E grey37
           201: (95,95,95) #5F5F5F srgb(95,95,95)
           190: (96,96,96) #606060 srgb(96,96,96)
           181: (97,97,97) #616161 grey38
           175: (98,98,98) #626262 srgb(98,98,98)
           190: (99,99,99) #636363 grey39
           187: (100,100,100) #646464 srgb(100,100,100)
           155: (101,101,101) #656565 srgb(101,101,101)
           151: (102,102,102) #666666 grey40
           133: (103,103,103) #676767 srgb(103,103,103)
           133: (104,104,104) #686868 srgb(104,104,104)
           123: (105,105,105) #696969 DimGray
           120: (106,106,106) #6A6A6A srgb(106,106,106)
           130: (107,107,107) #6B6B6B grey42
           102: (108,108,108) #6C6C6C srgb(108,108,108)
           109: (109,109,109) #6D6D6D srgb(109,109,109)
            86: (110,110,110) #6E6E6E grey43
           100: (111,111,111) #6F6F6F srgb(111,111,111)
           107: (112,112,112) #707070 grey44
            87: (113,113,113) #717171 srgb(113,113,113)
            79: (114,114,114) #727272 srgb(114,114,114)
            90: (115,115,115) #737373 grey45
            82: (116,116,116) #747474 srgb(116,116,116)
            76: (117,117,117) #757575 grey46
            62: (118,118,118) #767676 srgb(118,118,118)
            76: (119,119,119) #777777 srgb(119,119,119)
            72: (120,120,120) #787878 grey47
            54: (121,121,121) #797979 srgb(121,121,121)
            43: (122,122,122) #7A7A7A grey48
            56: (123,123,123) #7B7B7B srgb(123,123,123)
            51: (124,124,124) #7C7C7C srgb(124,124,124)
            58: (125,125,125) #7D7D7D grey49
            49: (126,126,126) #7E7E7E gray
            47: (127,127,127) #7F7F7F grey50
            45: (128,128,128) #808080 fractal
            32: (129,129,129) #818181 srgb(129,129,129)
            32: (130,130,130) #828282 grey51
            42: (131,131,131) #838383 srgb(131,131,131)
            39: (132,132,132) #848484 srgb(132,132,132)
            29: (133,133,133) #858585 grey52
            26: (134,134,134) #868686 srgb(134,134,134)
            17: (135,135,135) #878787 grey53
            18: (136,136,136) #888888 srgb(136,136,136)
            27: (137,137,137) #898989 srgb(137,137,137)
            19: (138,138,138) #8A8A8A grey54
            15: (139,139,139) #8B8B8B srgb(139,139,139)
            21: (140,140,140) #8C8C8C grey55
            14: (141,141,141) #8D8D8D srgb(141,141,141)
            17: (142,142,142) #8E8E8E srgb(142,142,142)
            13: (143,143,143) #8F8F8F grey56
            13: (144,144,144) #909090 srgb(144,144,144)
            12: (145,145,145) #919191 grey57
            18: (146,146,146) #929292 srgb(146,146,146)
             7: (147,147,147) #939393 srgb(147,147,147)
            14: (148,148,148) #949494 grey58
            10: (149,149,149) #959595 srgb(149,149,149)
             9: (150,150,150) #969696 grey59
            10: (151,151,151) #979797 srgb(151,151,151)
            12: (152,152,152) #989898 srgb(152,152,152)
             7: (153,153,153) #999999 grey60
             8: (154,154,154) #9A9A9A srgb(154,154,154)
             8: (155,155,155) #9B9B9B srgb(155,155,155)
            12: (156,156,156) #9C9C9C grey61
             9: (157,157,157) #9D9D9D srgb(157,157,157)
             5: (158,158,158) #9E9E9E grey62
             5: (159,159,159) #9F9F9F srgb(159,159,159)
             6: (160,160,160) #A0A0A0 srgb(160,160,160)
             6: (161,161,161) #A1A1A1 grey63
             8: (162,162,162) #A2A2A2 srgb(162,162,162)
             6: (163,163,163) #A3A3A3 grey64
             2: (164,164,164) #A4A4A4 srgb(164,164,164)
             4: (165,165,165) #A5A5A5 srgb(165,165,165)
             3: (166,166,166) #A6A6A6 grey65
             4: (167,167,167) #A7A7A7 srgb(167,167,167)
             4: (168,168,168) #A8A8A8 grey66
             4: (169,169,169) #A9A9A9 DarkGray
             9: (170,170,170) #AAAAAA srgb(170,170,170)
             4: (171,171,171) #ABABAB grey67
             4: (172,172,172) #ACACAC srgb(172,172,172)
             1: (173,173,173) #ADADAD grey68
             3: (174,174,174) #AEAEAE srgb(174,174,174)
             1: (175,175,175) #AFAFAF srgb(175,175,175)
             2: (178,178,178) #B2B2B2 srgb(178,178,178)
             2: (180,180,180) #B4B4B4 srgb(180,180,180)
             1: (182,182,182) #B6B6B6 srgb(182,182,182)
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33,0.03)
    green primary: (0.3,0.6,0.1)
    blue primary: (0.15,0.06,0.79)
    white point: (0.3127,0.329,0.3583)
  Matte color: grey74
  Background color: white
  Border color: srgb(223,223,223)
  Transparent color: black
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 256x256+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: None
  Orientation: TopLeft
  Properties:
    date:create: 2026-04-21T06:44:42+00:00
    date:modify: 2026-04-21T06:44:42+00:00
    date:timestamp: 2026-04-21T07:29:06+00:00
    signature: 69c401b7e54fa99cb3f8874deddb9d7dd916a55756980b8f384486fbb20626f4
  Artifacts:
    verbose: true
  Tainted: False
  Filesize: 196626B
  Number pixels: 65536
  Pixel cache type: Memory
  Pixels per second: 51.4088MP
  User time: 0.000u
  Elapsed time: 0:01.001
  Version: ImageMagick 7.1.1-47 Q16-HDRI x86_64 22763 https://imagemagick.org

Compared to one of Valve's files:

Image:
  Filename: /home/ambientimpact/.local/share/Steam/steamapps/common/Half-Life/valve/resource/background/21_9_1_a_loading.tga
  Permissions: rwxr-xr-x
  Format: TGA (Truevision Targa image)
  Class: DirectClass
  Geometry: 256x256+0+0
  Units: Undefined
  Colorspace: sRGB
  Type: Grayscale
  Base type: Undefined
  Endianness: Undefined
  Depth: 8-bit
  Channels: 3.0
  Channel depth:
    Red: 8-bit
    Green: 8-bit
    Blue: 8-bit
  Channel statistics:
    Pixels: 65536
    Red:
      min: 0  (0)
      max: 43 (0.168627)
      mean: 13.0114 (0.0510252)
      median: 12 (0.0470588)
      standard deviation: 8.22967 (0.0322732)
      kurtosis: -0.746749
      skewness: 0.449754
      entropy: 0.897625
    Green:
      min: 0  (0)
      max: 43 (0.168627)
      mean: 13.0114 (0.0510252)
      median: 12 (0.0470588)
      standard deviation: 8.22967 (0.0322732)
      kurtosis: -0.746749
      skewness: 0.449754
      entropy: 0.897625
    Blue:
      min: 0  (0)
      max: 43 (0.168627)
      mean: 13.0114 (0.0510252)
      median: 12 (0.0470588)
      standard deviation: 8.22967 (0.0322732)
      kurtosis: -0.746749
      skewness: 0.449754
      entropy: 0.897625
  Image statistics:
    Overall:
      min: 0  (0)
      max: 43 (0.168627)
      mean: 13.0114 (0.0510252)
      median: 12 (0.0470588)
      standard deviation: 8.22967 (0.0322732)
      kurtosis: -0.746749
      skewness: 0.449754
      entropy: 0.897625
  Colors: 44
  Histogram:
           158: (0,0,0) #000000 black
          1485: (1,1,1) #010101 srgb(1,1,1)
          3291: (2,2,2) #020202 srgb(2,2,2)
          3884: (3,3,3) #030303 grey1
          3178: (4,4,4) #040404 srgb(4,4,4)
          3311: (5,5,5) #050505 grey2
          2979: (6,6,6) #060606 srgb(6,6,6)
          2805: (7,7,7) #070707 srgb(7,7,7)
          2833: (8,8,8) #080808 grey3
          2694: (9,9,9) #090909 srgb(9,9,9)
          2484: (10,10,10) #0A0A0A grey4
          2646: (11,11,11) #0B0B0B srgb(11,11,11)
          2351: (12,12,12) #0C0C0C srgb(12,12,12)
          2376: (13,13,13) #0D0D0D grey5
          2358: (14,14,14) #0E0E0E srgb(14,14,14)
          2349: (15,15,15) #0F0F0F grey6
          2328: (16,16,16) #101010 srgb(16,16,16)
          2224: (17,17,17) #111111 srgb(17,17,17)
          2171: (18,18,18) #121212 grey7
          2008: (19,19,19) #131313 srgb(19,19,19)
          1960: (20,20,20) #141414 grey8
          1832: (21,21,21) #151515 srgb(21,21,21)
          1731: (22,22,22) #161616 srgb(22,22,22)
          1517: (23,23,23) #171717 grey9
          1478: (24,24,24) #181818 srgb(24,24,24)
          1277: (25,25,25) #191919 srgb(25,25,25)
          1116: (26,26,26) #1A1A1A grey10
           959: (27,27,27) #1B1B1B srgb(27,27,27)
           980: (28,28,28) #1C1C1C grey11
           870: (29,29,29) #1D1D1D srgb(29,29,29)
           588: (30,30,30) #1E1E1E srgb(30,30,30)
           503: (31,31,31) #1F1F1F grey12
           380: (32,32,32) #202020 srgb(32,32,32)
           248: (33,33,33) #212121 grey13
            84: (34,34,34) #222222 srgb(34,34,34)
            34: (35,35,35) #232323 srgb(35,35,35)
            25: (36,36,36) #242424 grey14
            12: (37,37,37) #252525 srgb(37,37,37)
            10: (38,38,38) #262626 grey15
             7: (39,39,39) #272727 srgb(39,39,39)
             4: (40,40,40) #282828 srgb(40,40,40)
             5: (41,41,41) #292929 grey16
             2: (42,42,42) #2A2A2A srgb(42,42,42)
             1: (43,43,43) #2B2B2B grey17
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33,0.03)
    green primary: (0.3,0.6,0.1)
    blue primary: (0.15,0.06,0.79)
    white point: (0.3127,0.329,0.3583)
  Matte color: grey74
  Background color: white
  Border color: srgb(223,223,223)
  Transparent color: black
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 256x256+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: None
  Orientation: TopLeft
  Properties:
    date:create: 2026-01-02T20:20:59+00:00
    date:modify: 2026-01-02T20:20:12+00:00
    date:timestamp: 2026-04-21T07:29:22+00:00
    signature: c7db50e133c40a15b4d053ff932d478a00ca96f9f2657a351090b5d910421fd0
  Artifacts:
    verbose: true
  Tainted: False
  Filesize: 196652B
  Number pixels: 65536
  Pixel cache type: Memory
  Pixels per second: 6.40754MP
  User time: 0.000u
  Elapsed time: 0:01.010
  Version: ImageMagick 7.1.1-47 Q16-HDRI x86_64 22763 https://imagemagick.org

Links

Background format

https://developer.valvesoftware.com/wiki/Menu_Background - notes "Origin: Bottom-left" but doesn't elaborate - is this related to our problem above?
https://twhl.info/wiki/page/Tutorial%3A_How_to_Make_HD_1080p_Backgrounds_for_HL1Goldsrc_Games

Tools

GoldSplash Modding Tool for Half-Life

ImageMagick

Potentially related to our issue:

ImageMagick seems to be able to get us most of the way there with: https://usage.imagemagick.org/crop/#crop_equal # Current progress However, after a lot of trial and error with getting the correct image format and other details, I'm stuck with the game appearing to flip the images within the rows like so: ![20260421032344_1](/attachments/4477f64a-f98b-4d3f-b3b2-ce60e2230670) Note how they seem to be in the correct rows and columns, but the squares are flipped vertically. Running [`magick identify -verbose`](https://imagemagick.org/identify/) on one of our own files gives me: ``` Image: Filename: /home/ambientimpact/Gaming/Half-Life/unforeseen-consequences/assets/build/resource/background/32_9_3072_512.tga Permissions: rw-r--r-- Format: TGA (Truevision Targa image) Class: DirectClass Geometry: 256x256+0+0 Units: Undefined Colorspace: sRGB Type: Grayscale Base type: Undefined Endianness: Undefined Depth: 8-bit Channels: 3.0 Channel depth: Red: 8-bit Green: 8-bit Blue: 8-bit Channel statistics: Pixels: 65536 Red: min: 0 (0) max: 182 (0.713725) mean: 45.2527 (0.177462) median: 40 (0.156863) standard deviation: 28.6463 (0.112338) kurtosis: 0.608275 skewness: 0.850975 entropy: 0.896463 Green: min: 0 (0) max: 182 (0.713725) mean: 45.2527 (0.177462) median: 40 (0.156863) standard deviation: 28.6463 (0.112338) kurtosis: 0.608275 skewness: 0.850975 entropy: 0.896463 Blue: min: 0 (0) max: 182 (0.713725) mean: 45.2527 (0.177462) median: 40 (0.156863) standard deviation: 28.6463 (0.112338) kurtosis: 0.608275 skewness: 0.850975 entropy: 0.896463 Image statistics: Overall: min: 0 (0) max: 182 (0.713725) mean: 45.2527 (0.177462) median: 40 (0.156863) standard deviation: 28.6463 (0.112338) kurtosis: 0.608275 skewness: 0.850975 entropy: 0.896463 Colors: 179 Histogram: 1331: (0,0,0) #000000 black 214: (1,1,1) #010101 srgb(1,1,1) 211: (2,2,2) #020202 srgb(2,2,2) 328: (3,3,3) #030303 grey1 247: (4,4,4) #040404 srgb(4,4,4) 309: (5,5,5) #050505 grey2 444: (6,6,6) #060606 srgb(6,6,6) 433: (7,7,7) #070707 srgb(7,7,7) 416: (8,8,8) #080808 grey3 535: (9,9,9) #090909 srgb(9,9,9) 516: (10,10,10) #0A0A0A grey4 477: (11,11,11) #0B0B0B srgb(11,11,11) 642: (12,12,12) #0C0C0C srgb(12,12,12) 570: (13,13,13) #0D0D0D grey5 627: (14,14,14) #0E0E0E srgb(14,14,14) 729: (15,15,15) #0F0F0F grey6 832: (16,16,16) #101010 srgb(16,16,16) 898: (17,17,17) #111111 srgb(17,17,17) 1038: (18,18,18) #121212 grey7 994: (19,19,19) #131313 srgb(19,19,19) 961: (20,20,20) #141414 grey8 1047: (21,21,21) #151515 srgb(21,21,21) 1135: (22,22,22) #161616 srgb(22,22,22) 1027: (23,23,23) #171717 grey9 1096: (24,24,24) #181818 srgb(24,24,24) 1306: (25,25,25) #191919 srgb(25,25,25) 1169: (26,26,26) #1A1A1A grey10 1067: (27,27,27) #1B1B1B srgb(27,27,27) 1108: (28,28,28) #1C1C1C grey11 1131: (29,29,29) #1D1D1D srgb(29,29,29) 1041: (30,30,30) #1E1E1E srgb(30,30,30) 1028: (31,31,31) #1F1F1F grey12 1026: (32,32,32) #202020 srgb(32,32,32) 975: (33,33,33) #212121 grey13 987: (34,34,34) #222222 srgb(34,34,34) 1025: (35,35,35) #232323 srgb(35,35,35) 994: (36,36,36) #242424 grey14 927: (37,37,37) #252525 srgb(37,37,37) 852: (38,38,38) #262626 grey15 853: (39,39,39) #272727 srgb(39,39,39) 840: (40,40,40) #282828 srgb(40,40,40) 803: (41,41,41) #292929 grey16 835: (42,42,42) #2A2A2A srgb(42,42,42) 788: (43,43,43) #2B2B2B grey17 726: (44,44,44) #2C2C2C srgb(44,44,44) 794: (45,45,45) #2D2D2D srgb(45,45,45) 822: (46,46,46) #2E2E2E grey18 748: (47,47,47) #2F2F2F srgb(47,47,47) 760: (48,48,48) #303030 grey19 734: (49,49,49) #313131 srgb(49,49,49) 760: (50,50,50) #323232 srgb(50,50,50) 757: (51,51,51) #333333 grey20 816: (52,52,52) #343434 srgb(52,52,52) 733: (53,53,53) #353535 srgb(53,53,53) 693: (54,54,54) #363636 grey21 700: (55,55,55) #373737 srgb(55,55,55) 643: (56,56,56) #383838 grey22 707: (57,57,57) #393939 srgb(57,57,57) 641: (58,58,58) #3A3A3A srgb(58,58,58) 638: (59,59,59) #3B3B3B grey23 588: (60,60,60) #3C3C3C srgb(60,60,60) 593: (61,61,61) #3D3D3D grey24 570: (62,62,62) #3E3E3E srgb(62,62,62) 507: (63,63,63) #3F3F3F srgb(63,63,63) 573: (64,64,64) #404040 grey25 540: (65,65,65) #414141 srgb(65,65,65) 489: (66,66,66) #424242 grey26 501: (67,67,67) #434343 srgb(67,67,67) 504: (68,68,68) #444444 srgb(68,68,68) 527: (69,69,69) #454545 grey27 446: (70,70,70) #464646 srgb(70,70,70) 477: (71,71,71) #474747 grey28 440: (72,72,72) #484848 srgb(72,72,72) 476: (73,73,73) #494949 srgb(73,73,73) 441: (74,74,74) #4A4A4A grey29 413: (75,75,75) #4B4B4B srgb(75,75,75) 439: (76,76,76) #4C4C4C srgb(76,76,76) 389: (77,77,77) #4D4D4D grey30 356: (78,78,78) #4E4E4E srgb(78,78,78) 375: (79,79,79) #4F4F4F grey31 372: (80,80,80) #505050 srgb(80,80,80) 317: (81,81,81) #515151 srgb(81,81,81) 338: (82,82,82) #525252 grey32 278: (83,83,83) #535353 srgb(83,83,83) 299: (84,84,84) #545454 grey33 307: (85,85,85) #555555 srgb(85,85,85) 287: (86,86,86) #565656 srgb(86,86,86) 274: (87,87,87) #575757 grey34 302: (88,88,88) #585858 srgb(88,88,88) 253: (89,89,89) #595959 grey35 248: (90,90,90) #5A5A5A srgb(90,90,90) 254: (91,91,91) #5B5B5B srgb(91,91,91) 227: (92,92,92) #5C5C5C grey36 248: (93,93,93) #5D5D5D srgb(93,93,93) 210: (94,94,94) #5E5E5E grey37 201: (95,95,95) #5F5F5F srgb(95,95,95) 190: (96,96,96) #606060 srgb(96,96,96) 181: (97,97,97) #616161 grey38 175: (98,98,98) #626262 srgb(98,98,98) 190: (99,99,99) #636363 grey39 187: (100,100,100) #646464 srgb(100,100,100) 155: (101,101,101) #656565 srgb(101,101,101) 151: (102,102,102) #666666 grey40 133: (103,103,103) #676767 srgb(103,103,103) 133: (104,104,104) #686868 srgb(104,104,104) 123: (105,105,105) #696969 DimGray 120: (106,106,106) #6A6A6A srgb(106,106,106) 130: (107,107,107) #6B6B6B grey42 102: (108,108,108) #6C6C6C srgb(108,108,108) 109: (109,109,109) #6D6D6D srgb(109,109,109) 86: (110,110,110) #6E6E6E grey43 100: (111,111,111) #6F6F6F srgb(111,111,111) 107: (112,112,112) #707070 grey44 87: (113,113,113) #717171 srgb(113,113,113) 79: (114,114,114) #727272 srgb(114,114,114) 90: (115,115,115) #737373 grey45 82: (116,116,116) #747474 srgb(116,116,116) 76: (117,117,117) #757575 grey46 62: (118,118,118) #767676 srgb(118,118,118) 76: (119,119,119) #777777 srgb(119,119,119) 72: (120,120,120) #787878 grey47 54: (121,121,121) #797979 srgb(121,121,121) 43: (122,122,122) #7A7A7A grey48 56: (123,123,123) #7B7B7B srgb(123,123,123) 51: (124,124,124) #7C7C7C srgb(124,124,124) 58: (125,125,125) #7D7D7D grey49 49: (126,126,126) #7E7E7E gray 47: (127,127,127) #7F7F7F grey50 45: (128,128,128) #808080 fractal 32: (129,129,129) #818181 srgb(129,129,129) 32: (130,130,130) #828282 grey51 42: (131,131,131) #838383 srgb(131,131,131) 39: (132,132,132) #848484 srgb(132,132,132) 29: (133,133,133) #858585 grey52 26: (134,134,134) #868686 srgb(134,134,134) 17: (135,135,135) #878787 grey53 18: (136,136,136) #888888 srgb(136,136,136) 27: (137,137,137) #898989 srgb(137,137,137) 19: (138,138,138) #8A8A8A grey54 15: (139,139,139) #8B8B8B srgb(139,139,139) 21: (140,140,140) #8C8C8C grey55 14: (141,141,141) #8D8D8D srgb(141,141,141) 17: (142,142,142) #8E8E8E srgb(142,142,142) 13: (143,143,143) #8F8F8F grey56 13: (144,144,144) #909090 srgb(144,144,144) 12: (145,145,145) #919191 grey57 18: (146,146,146) #929292 srgb(146,146,146) 7: (147,147,147) #939393 srgb(147,147,147) 14: (148,148,148) #949494 grey58 10: (149,149,149) #959595 srgb(149,149,149) 9: (150,150,150) #969696 grey59 10: (151,151,151) #979797 srgb(151,151,151) 12: (152,152,152) #989898 srgb(152,152,152) 7: (153,153,153) #999999 grey60 8: (154,154,154) #9A9A9A srgb(154,154,154) 8: (155,155,155) #9B9B9B srgb(155,155,155) 12: (156,156,156) #9C9C9C grey61 9: (157,157,157) #9D9D9D srgb(157,157,157) 5: (158,158,158) #9E9E9E grey62 5: (159,159,159) #9F9F9F srgb(159,159,159) 6: (160,160,160) #A0A0A0 srgb(160,160,160) 6: (161,161,161) #A1A1A1 grey63 8: (162,162,162) #A2A2A2 srgb(162,162,162) 6: (163,163,163) #A3A3A3 grey64 2: (164,164,164) #A4A4A4 srgb(164,164,164) 4: (165,165,165) #A5A5A5 srgb(165,165,165) 3: (166,166,166) #A6A6A6 grey65 4: (167,167,167) #A7A7A7 srgb(167,167,167) 4: (168,168,168) #A8A8A8 grey66 4: (169,169,169) #A9A9A9 DarkGray 9: (170,170,170) #AAAAAA srgb(170,170,170) 4: (171,171,171) #ABABAB grey67 4: (172,172,172) #ACACAC srgb(172,172,172) 1: (173,173,173) #ADADAD grey68 3: (174,174,174) #AEAEAE srgb(174,174,174) 1: (175,175,175) #AFAFAF srgb(175,175,175) 2: (178,178,178) #B2B2B2 srgb(178,178,178) 2: (180,180,180) #B4B4B4 srgb(180,180,180) 1: (182,182,182) #B6B6B6 srgb(182,182,182) Rendering intent: Perceptual Gamma: 0.454545 Chromaticity: red primary: (0.64,0.33,0.03) green primary: (0.3,0.6,0.1) blue primary: (0.15,0.06,0.79) white point: (0.3127,0.329,0.3583) Matte color: grey74 Background color: white Border color: srgb(223,223,223) Transparent color: black Interlace: None Intensity: Undefined Compose: Over Page geometry: 256x256+0+0 Dispose: Undefined Iterations: 0 Compression: None Orientation: TopLeft Properties: date:create: 2026-04-21T06:44:42+00:00 date:modify: 2026-04-21T06:44:42+00:00 date:timestamp: 2026-04-21T07:29:06+00:00 signature: 69c401b7e54fa99cb3f8874deddb9d7dd916a55756980b8f384486fbb20626f4 Artifacts: verbose: true Tainted: False Filesize: 196626B Number pixels: 65536 Pixel cache type: Memory Pixels per second: 51.4088MP User time: 0.000u Elapsed time: 0:01.001 Version: ImageMagick 7.1.1-47 Q16-HDRI x86_64 22763 https://imagemagick.org ``` Compared to one of Valve's files: ``` Image: Filename: /home/ambientimpact/.local/share/Steam/steamapps/common/Half-Life/valve/resource/background/21_9_1_a_loading.tga Permissions: rwxr-xr-x Format: TGA (Truevision Targa image) Class: DirectClass Geometry: 256x256+0+0 Units: Undefined Colorspace: sRGB Type: Grayscale Base type: Undefined Endianness: Undefined Depth: 8-bit Channels: 3.0 Channel depth: Red: 8-bit Green: 8-bit Blue: 8-bit Channel statistics: Pixels: 65536 Red: min: 0 (0) max: 43 (0.168627) mean: 13.0114 (0.0510252) median: 12 (0.0470588) standard deviation: 8.22967 (0.0322732) kurtosis: -0.746749 skewness: 0.449754 entropy: 0.897625 Green: min: 0 (0) max: 43 (0.168627) mean: 13.0114 (0.0510252) median: 12 (0.0470588) standard deviation: 8.22967 (0.0322732) kurtosis: -0.746749 skewness: 0.449754 entropy: 0.897625 Blue: min: 0 (0) max: 43 (0.168627) mean: 13.0114 (0.0510252) median: 12 (0.0470588) standard deviation: 8.22967 (0.0322732) kurtosis: -0.746749 skewness: 0.449754 entropy: 0.897625 Image statistics: Overall: min: 0 (0) max: 43 (0.168627) mean: 13.0114 (0.0510252) median: 12 (0.0470588) standard deviation: 8.22967 (0.0322732) kurtosis: -0.746749 skewness: 0.449754 entropy: 0.897625 Colors: 44 Histogram: 158: (0,0,0) #000000 black 1485: (1,1,1) #010101 srgb(1,1,1) 3291: (2,2,2) #020202 srgb(2,2,2) 3884: (3,3,3) #030303 grey1 3178: (4,4,4) #040404 srgb(4,4,4) 3311: (5,5,5) #050505 grey2 2979: (6,6,6) #060606 srgb(6,6,6) 2805: (7,7,7) #070707 srgb(7,7,7) 2833: (8,8,8) #080808 grey3 2694: (9,9,9) #090909 srgb(9,9,9) 2484: (10,10,10) #0A0A0A grey4 2646: (11,11,11) #0B0B0B srgb(11,11,11) 2351: (12,12,12) #0C0C0C srgb(12,12,12) 2376: (13,13,13) #0D0D0D grey5 2358: (14,14,14) #0E0E0E srgb(14,14,14) 2349: (15,15,15) #0F0F0F grey6 2328: (16,16,16) #101010 srgb(16,16,16) 2224: (17,17,17) #111111 srgb(17,17,17) 2171: (18,18,18) #121212 grey7 2008: (19,19,19) #131313 srgb(19,19,19) 1960: (20,20,20) #141414 grey8 1832: (21,21,21) #151515 srgb(21,21,21) 1731: (22,22,22) #161616 srgb(22,22,22) 1517: (23,23,23) #171717 grey9 1478: (24,24,24) #181818 srgb(24,24,24) 1277: (25,25,25) #191919 srgb(25,25,25) 1116: (26,26,26) #1A1A1A grey10 959: (27,27,27) #1B1B1B srgb(27,27,27) 980: (28,28,28) #1C1C1C grey11 870: (29,29,29) #1D1D1D srgb(29,29,29) 588: (30,30,30) #1E1E1E srgb(30,30,30) 503: (31,31,31) #1F1F1F grey12 380: (32,32,32) #202020 srgb(32,32,32) 248: (33,33,33) #212121 grey13 84: (34,34,34) #222222 srgb(34,34,34) 34: (35,35,35) #232323 srgb(35,35,35) 25: (36,36,36) #242424 grey14 12: (37,37,37) #252525 srgb(37,37,37) 10: (38,38,38) #262626 grey15 7: (39,39,39) #272727 srgb(39,39,39) 4: (40,40,40) #282828 srgb(40,40,40) 5: (41,41,41) #292929 grey16 2: (42,42,42) #2A2A2A srgb(42,42,42) 1: (43,43,43) #2B2B2B grey17 Rendering intent: Perceptual Gamma: 0.454545 Chromaticity: red primary: (0.64,0.33,0.03) green primary: (0.3,0.6,0.1) blue primary: (0.15,0.06,0.79) white point: (0.3127,0.329,0.3583) Matte color: grey74 Background color: white Border color: srgb(223,223,223) Transparent color: black Interlace: None Intensity: Undefined Compose: Over Page geometry: 256x256+0+0 Dispose: Undefined Iterations: 0 Compression: None Orientation: TopLeft Properties: date:create: 2026-01-02T20:20:59+00:00 date:modify: 2026-01-02T20:20:12+00:00 date:timestamp: 2026-04-21T07:29:22+00:00 signature: c7db50e133c40a15b4d053ff932d478a00ca96f9f2657a351090b5d910421fd0 Artifacts: verbose: true Tainted: False Filesize: 196652B Number pixels: 65536 Pixel cache type: Memory Pixels per second: 6.40754MP User time: 0.000u Elapsed time: 0:01.010 Version: ImageMagick 7.1.1-47 Q16-HDRI x86_64 22763 https://imagemagick.org ``` # Links ## Background format * https://developer.valvesoftware.com/wiki/Menu_Background - notes "Origin: Bottom-left" but doesn't elaborate - is this related to our problem above? * https://twhl.info/wiki/page/Tutorial%3A_How_to_Make_HD_1080p_Backgrounds_for_HL1Goldsrc_Games ## Tools * [GoldSplash Modding Tool for Half-Life](https://gamebanana.com/tools/22448) ## ImageMagick Potentially related to our issue: * [A TGA image converted to PNG is flipped vertically. · Issue #3844 · ImageMagick/ImageMagick](https://github.com/ImageMagick/ImageMagick/issues/3844) * [ImageMagick convert tool writes a non-default TGA format and sets a metadata to tell third-party tools to adjust · Issue #3903 · ImageMagick/ImageMagick](https://github.com/ImageMagick/ImageMagick/issues/3903) * [Thomas Debesse / Investigating TGA orientation in ImageMagick · GitLab](https://gitlab.com/illwieckz/investigating-tga-orientation-in-imagemagick)