Halp! Brightmaps on scaled textures only work in Zandronum

[chebmaster]

Could someone please point it to me, why scaled brightmap works in Zandronum but not in GZDoom:
What am I doing wrong?

textures:

Code: Select all

texture STAINGL2, 128, 2048 {
	XScale 0.5
	YScale 0.5	
	Patch STAINGL1, 0, 0
}
texture STAINGL4, 512, 512 {
	XScale 0.5
	YScale 0.5	
	Patch STAINGL3, 0, 0
}

gldefs:

Code: Select all

brightmap texture STAINGL2
{
	map "brightmaps/STAINGL1.png"
}
brightmap texture STAINGL4
{
	map "brightmaps/STAINGL3.png"
}

I tried making the brightmap into a similarly scaled texture and referring to it in the "map" parameter but that did not work either.

Using 1:1 scale is not an option: they are too too gargantuan.