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Created by Steve Minton@Mapsking

Many older .tga images not displaying alpha channels correctly

GIMP version: 2.10.8

Operating System: Win 10 x64

Package: Installer from gimp.org

Description of the bug

I look at lots of textures for game maps, and many are in the .tga format. Many, if not most of the images show the partially transparent parts of the image as totally transparent, but some show partial transparency, and have provided screenshots of each, and also the exact files. However, when I view the same image in LibreOffice Draw, or in game, they show up correctly. These are often older .tga files from several years ago, but not all. I have seen #2337 (closed) and #1111 (closed) and maybe it is related, but I am not sure. I am by no means an expert, just confused as to why the images do not show up correctly. Here are some samples of images that show in GIMP with missing parts, but correctly in LibreOffice Draw. I feel maybe there is a setting I need to change to see the images correctly in GIMP, but don't know what to do. Please help me be able to see the full image when I load it into GIMP.

Reproduction

Is the bug reproducible? Always

Reproduction steps:

  1. Load image into GIMP, it appears blank
  2. Load image into LibreOffice Draw, it appears complete

Image 1 in GIMPGIMP_showing_blank_image

Image 1 in LibreOffice DrawLibreOffice_Draw_showing_image_correctly

Image 2 in GIMPGimp__2

Image 2 in LibreOffice DrawLibreOffice_Draw__2

Image 3 in GIMPGimp__3

Image 3 in LibreOffice DrawLibreOffice_Draw__3

Image 4 in GIMPGimp__4

Image 4 in LibreOffice DrawLibreOffice_Draw__4

Image 5 in GIMPGimp__5

Image 5 in LibreOffice DrawLibreOffice_Draw__5

Image 6 in GimpGimp__6

Image 6 in LibreOffice DrawLibreOffice_Draw__6

Here Source_images.7zis the .7z file with the exact images I used. I apologize if I have put too much info into this post, but I hope I have provided enough information to understand, or at least, get help and fix this. Thanks. …

Expected result: image to show fully in GIMP

Actual result: image shows as fully transparent when opened in GIMP

Additional information

LibreOffice version is Version: 6.1.1.2 (x64), also on same Windows 10 x64 machine. I only am using this as a generic example, because it was the only other default program Windows suggested for opening .tga files, but have not tried other programs.

Edited by Steve Minton