Textures and the bottom left icons, add, noz and add_noz

[Airashii]

Sometimes multiple entries of a texture occur. sprites/light_glow02 for example comes as the following:

sprites/light_glow02
sprites/light_glow02_add
sprites/light_glow02_add_noz
sprites/light_glow02_noz

A screenshot:


What is the meaning of these texture attributes?

[Armageddon]

Add means additive. I'm assuming noz means no Z axis or no fog. Just use the regular glow probably.

[MrTwoVideoCards]

noz means no depth, which means it will render through the leaf system, almost as if it were in screenspace.