Hey everyone! I'm wondering if someone here might be able to help me out with this normal from SWBF2. As far as I've seen so far, this is the only one like this -- I know that the Green layer is meant to be different to the red, but here they're the same. Does anyone know how to fix this?
Yep, green is just a copy of red one, so this map won't work at all, green should have something that resembles shapes lightened from up-down (or down-up depends on the engine). And afaik, there's no way to convert it, you need all original data.
As I understand, generally* red is normal direction on X coord.
Green is normal direction along Y coord. You currently have a copy of X here.
Blue is normal direction straight out from the surface (Z). Most of the time it's just plain white.
Btw, whatever is in the blue rn might be used separately as specular map.
(*) also depends on engine. Everything comes down to where you want to render it.