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First, extract textures from files with multitool. | First, extract textures from files with multitool. | ||
Open these files in GIMP. Uncheck load mipmaps as you don’t need them clogging up the work area, and you are going to create new ones when you re-save it. | Open these files in GIMP. Uncheck load mipmaps as you don’t need them clogging up the work area, and you are going to create new ones when you re-save it. | ||
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==== Reminder about exported textures ==== | ==== Reminder about exported textures ==== | ||
Textures do not export from virtual textures with mipmaps attached, which causes a static effect. Even if you are not editing some maps, you need to import them into GIMP and resave with mipmaps to generate new ones. | Textures do not export from virtual textures with mipmaps attached, which causes a static effect. Even if you are not editing some maps, you need to import them into GIMP and resave with mipmaps to generate new ones. | ||
=== Physical Map === | === Physical Map === | ||
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=== Normal Map === | === Normal Map === | ||
Colours>Components>Decompose> Colour model RGBA | '''Colours>Components>Decompose>Colour model RGBA''' | ||
Select the green channel, and '''Value Invert'''. This should cause it to flip to ooking rightside out instead of inside out. | |||
It should become purple | '''Colours>Components>Compose>Select ‘RGB’''' and put the alpha channel in the RED slot. | ||
It should become purple. Save as PNG. | |||
This | This is an Open GL normal map. The inverted green channel turns it from DIRECTX to OPENGL. | ||
You can overlay PBR materials on it if you choose. | |||
You | Remember to do all these steps in reverse to export the texture in the right format. | ||
<gallery heights="300px"> | |||
GIMPLOADDDSHOW.webp|thumb|You should be prompted with this box. | |||
GIMPHOWTODECOMPOSE1.webp|thumb|Colours>Components>Decompose | |||
BG3DECOMPOSENORMALGIMP.webp|thumb|Decompose to RBGA. This is important as half the normal map is in the red channel. | |||
GIMVALUEINVERThowto.webp|thumb|How to invert the green channel | |||
GREENCHANNELbg3nmINVERT.webp|thumb|Green channel example- invert this to make a normal map OpenGL. | |||
</gallery> | |||
== File sizes == | == File sizes == | ||