editing 256 colour .bmp files Created 1 year ago2018-01-21 02:13:56 UTC by tschumann tschumann

Created 1 year ago2018-01-21 02:13:56 UTC by tschumann tschumann

Posted 1 year ago2018-01-21 02:13:56 UTC Post #338694
What is a good program that allows editing of the palette of a 256 colour .bmp file?
Posted 1 year ago2018-01-21 03:53:24 UTC Post #338697
paint.net, gimp, photoshop
Posted 1 year ago2018-01-21 04:01:54 UTC Post #338698
paint.net
Do you know where? Everything I can find seems to suggest the palette is generated on save.
Posted 1 year ago2018-01-21 13:25:28 UTC Post #338702
@twitch1 But Gimp can not save to correct 8-bit format because bmp from Gimp is saving only 16 bit....
Posted 1 year ago2018-01-21 13:27:03 UTC Post #338704
Everything I can find seems to suggest the palette is generated on save.
Ugh, yeah, unfortunately, I believe you are right. And I didn't realize Gimp didn't save 8-bit.
Posted 1 year ago2018-01-21 14:06:39 UTC Post #338705
Wally can edit palettes: http://www.slackiller.com/hlprograms/wally_155b.exe

Sidenote: somebody really needs to back up slackiller's site before it goes down, that stuff is getting hard to find.
Posted 1 year ago2018-01-21 15:07:04 UTC Post #338706
@twitch1
Ugh, yeah, unfortunately, I believe you are right. And I didn't realize Gimp didn't save 8-bit.
Yeah I have tried. I recommend if you want buy small money like Affinity Photo. I don't know while Affinity Photo has sometimes 8-bit bmp.
// EDIT: Bad news because I found. Community of Affinity
Posted 1 year ago2018-01-22 06:38:12 UTC Post #338710
Export as PNG > Load into Wally > Process color indexes manually.
If you want to create decal textures.

If you want to edit in index mode and be able to export in 8bit photoshop is the best solution. I believe photoshop CS2 is now free for use.
Stojke StojkeOPL - 3
Posted 1 year ago2018-01-22 10:07:39 UTC Post #338712
Alright looks like Wally might be the easiest option - thanks.
Posted 1 year ago2018-01-22 12:41:37 UTC Post #338713
GIMP can indeed edit images in 8-bit which allows you to rearrange the colours in the palette, as well as saving the BMP as 8-bit. Pretty neat.
Image -> Mode -> Indexed. Make sure to pick 256 colours instead of 255 (since 0-255).

I don't use Wally as much as I used to. I use HL Texture Tools instead.

HL Texture Tools is actually extremely useful if you just want to fix transparent textures. You use the colour picker and it automatically changes that colour's index to #255. It can also load, save and edit palettes as far as I'm aware.

Lastly, there was a tool I once used. I think it was called PixelScape or something like that. It was the time when I wasn't aware of GIMP's 8-bit capabilities.
Admer456 Admer456Lean, mean, mapping machine :3
Posted 1 year ago2018-01-27 06:36:56 UTC Post #338716
Hl Texture tools is cool stuff and fairly modern compared to a lot of the existing HL editing programs.

One problem I have with GIMP is that it will at times alter 8bit palettes with unpredictable results (for example changing "pure blue" [RGB 0 0 255] to something silly like [RGB 10 21 255] ). Personally id say if you use GIMP to edit images, save it as regular unindexed 24bit color and use IRFANVIEW or wally or HLtools to do the 8bit conversion.

Also tschumann, if you havent seen it before I made a very extensive map texture tutorial with a lot of BMP/WAD info:
http://www.the303.org/tutorials/gold_texture.htm
Posted 1 year ago2018-01-29 07:35:39 UTC Post #338721
Alteration of colors might be due to antialiasing being enabled.
Stojke StojkeOPL - 3
Posted 1 year ago2018-01-31 11:31:41 UTC Post #338740
hl texture tools
Alright I might look into this too (open source so nice!).
Also tschumann, if you havent seen it before I made a very extensive map texture tutorial with a lot of BMP/WAD info:
http://www.the303.org/tutorials/gold_textur
e.htm
Thanks looks like a good reference.
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