I'm rendering a shot of smoke in Mantra with geometry holdouts, and we're working in deep.

My RGB pass is fine, and my deep pass too, except for the areas where the smoke touches the geometry holdouts, where it looks as if the deep pass is not anti-aliased at all.

What I've tried so far:

Decreasing the DCM compression
Increasing the DCM Z storage precision to 64 bit
Increasing the pixel samples

…without luck. Anybody has other ideas? Not too experienced with deep rendering so feel free to point out something really obvious.

Anybody? No way to get antialiased values in a Mantra DCM? Or is there a workaround I'm not aware of? How are you guys using it?

Can you post an image so we can see what you are referring to?
Have you tried turning off the Stochastic Samples?

Tyler Britton2
Can you post an image so we can see what you are referring to?

I can't, sadly, but just imagine a render with one sample per pixel. Kinda works for volumes, but when they're cut off by geo, you get ugly staircase aliasing.

Tyler Britton2
Have you tried turning off the Stochastic Samples?

I haven't actually, as I had read they're turned off automatically for DCM's. Should it help? I'll give it a try.

Tyler Britton2
Have you tried turning off the Stochastic Samples?

I haven't actually, as I had read they're turned off automatically for DCM's. Should it help? I'll give it a try.

Try this.