See through walls?

[bender647]

When I'm downstairs in my level's complex,
I can see the firefight in the floor above through
the ceiling. The weapon discharges have light
that penetrates the floor?

Is this an error in my textures, or perhaps
a floor thickness of only 16 is not enough?

[_Zd_3s_]

I also had it. It seems to be a problem with custom textures... Anyone knows how to solve it?? Wheeeelp!!!

[bender647]

I was suspecting that it may be the use of
color zero in the palette, making the texture
partially transparent in small points.

But I don't know how to tell Photoshop to
not use a color when I convert to indexed.