Zdepth And Transparency

[user_deleted]

I'm trying to render out a forground object containing transparencey in the shader. I need for the transparency to cut out the object in the zdepth chanel as well. Does anyone know how I would do this? (the transparency has just been making the whole object absent from my zdepth channel)

Please help thanks!

[deke-kincaid]

Thats just how a zdepth works. It doesn't see transparency or antialiasing. You need to render an rgb generated one with a zdepth shader. Make sure you render it at atleast 16 bit.

[joojaa]

acttualy beaker is worng. Under the camera settings there is a option for maya to use furthest wisible depth, it also includes a aoption for what to consider transparent.

By the way using a commandline render just render z in a shadowmap generation command allows even dmap shadows to se thru alphamapped objects.

[user_deleted]

Maybe I haven't explained what I'm trying to do correctly or I'm missunderstandeing your response.
I have an object that has a transparency map applied to it, I want for this object to appear in my zdepth file but only the sections of the object that are opaque.
Is there a way to do this?

[joojaa]

Select camera (view -> select camera), hit ctrl-a for attribute editor make sure the camera shape tab is the frontmost. Under outut settings set depth type to closest visible depth. (sorry i remebered it worng because its diametricaly upside down to what i think), now you can adjust treshold to tell how much trabsparecy is to considered invisible for z.

Note z is allways unaliased! nmake also sure the depth output is ticked!

[user_deleted]

Thankyou Thankyou Thankyou, exactly what I needed!
Super Cool! You Rock!

[sagun-manandhar]

sorry for interfering but it's quite similar

Problem :

-->Fading Out A Scene Along A Distance Including Glows, Tranparent Maps and Alpha Channel <--

Hi, i am working on a project .. trying to do a neon city.. where i am using lots of Glows.. Transparent Text(psd files) and animating psd layers..

i don't have anything in the background. it's black. and the city is kind of huge.. so i want the scene to be faded out along a distance. but

-> i can't get the alpha channel, glow is not effected by distance while using env. fog.

-> I can't get correct depth matte usind depth Shader in maya since im using transparent maps. and s

-> using light and decay is okay with glows but behaving strange.. also alpha is not created.

so pls help me..

ps. -> i'm rendering in maya software and so far will be usin

[user_deleted]

Render your zdepth the way JooJaa sugested and render a seperate mask for your glowing objects(just make a copy of your scene with glowing objects mapped flat white, no glo and everything else black). Render the scene with no glow, and add the glow after in a compositing package, using hte zdepth and the glow mask to control the amount of glow. Also use the zdepth to control a colour correct to fade out your scene in the distance. I'd also render the fog out seperately and comp that in later to have more control.