Well i did spend an extensive time testing:
Coverted the interior1.dds with DXT1c, DXT1a, DXT3 (and deleted alpha),
or one of those with enabled and modified alpha.
Result? always the same, the game treats the greyscale as transparent in that
skin portion (as in the car model, i guess).
So its probably
hard coded in the game, altough it might be a glow
texture hidden somewhere (_g.dds suffix), or even another simple texture
that is used for other lights too.
Either ways, i wish the developers would:
-tell me if theres a way to override the damn alpha or enable the alpha
i'll be making :P
or
-in the next patch make the model color as white, currently the red lights
are beige, corner lights orange, Rlights white; since the model itself
is covered by the texture anyways (you dont use the transparency to
interpolate the two colors), the car model might aswell be all white.
That being said, since you can even save a jpg and rename it .dds (no
alpha channel then), the game STILL treats it as anything else, applies
alpha channel to color scales. Conclusion : i give up
Anyways, new headlight skin, more genuine and realisting, imho, the lights
shape as a whole is off so i'll have another go at it! Rear lights, gonna try
to make em purely digital rather than chop a photo and see how things
turn out; grill is finished, im not satisfied with it so i'll make another one too.
Thanks for reading this wall of text. By the way, if a mod can move this
thread to "skin work in progress" and rename the thread "Skyline gtr32 conversion for xr's" i'd be grateful for it, cheers.