Z buffers and transparancy

[kaffiene]

Hey there

Whats the usual solution to rendering transparent objects when using the z-buffer?  I have a partially transparent quad I'm rendering which I want to be occluded by geometry in front of it (which works) but the transparent parts of the quad write into the z-buffer and obscure stuff behind the quad which should otherwise be visible.

any ideas?

thx!

[Riven]

Uhm.. Google?


1. render opaque geometry (roughly front to back)
2. render transparant geometry (strictly back to front)