Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: hughannes on 2019-05-20, 13:44:14

Title: Material ID
Post by: hughannes on 2019-05-20, 13:44:14

I have trouble getting a clean Photoshop-Selection from the material ID pass. I'm coming from Vray where I never had that problem.
Am I the only one experiencing this issue?

Thank you in advance!

Title: Re: Material ID
Post by: HFPatzi on 2019-05-20, 16:29:29

Hey!

Are you using teamrender? There is an issue with material ID Passes and teamsrender.

Greetings,

Moritz

Title: Re: Material ID
Post by: hughannes on 2019-05-20, 18:12:40

I know about the Teamrender issue, thank you. However, the issue I'm having is with renders on a single machine.

Title: Re: Material ID
Post by: TomG on 2019-05-20, 19:22:02

A post of your results, showing what you mean, would be helpful. Is it to do with anti-aliasing at the edges? Have you tried with Filtering off or on for that render element?

Title: Re: Material ID
Post by: hughannes on 2019-05-22, 16:53:59

Sure. I've attached a crop.
I used filtering as I'm working in Photoshop. I understand Nuke for instance prefers aliased selections and does the anti-aliasing after the fact. However, that's not an option for us.

Title: Re: Material ID
Post by: hellyeah on 2019-05-23, 14:51:44

I´m optimizing something like that with the "Select and Mask" Feature. Normally works fine.

Title: Re: Material ID
Post by: hughannes on 2019-05-27, 09:00:12

Thanks for the tip. However I was hoping there was a non-workaround solution.
We're doing dozens of selections each render. Anything longer than a point-and-click solution seems too laborious. Especially coming from a renderer that let me do just that.

Title: Re: Material ID
Post by: davetwo on 2019-05-27, 09:29:53

I know what you mean about the edges of the masks (alphas) not being as clean as I'm used to. I think the Anti-aliased edges are sacrificed a bit in the balance to get clean-ish renders fast.
If you're not using a super complicated scene, I sometimes render a native C4D standard or physical pass with no lights or GI afterwards. The masks are super-sharp and the render only takes a couple of seconds.

Title: Re: Material ID
Post by: hellyeah on 2019-05-27, 09:34:47

Quote from: davetwo on 2019-05-27, 09:29:53

If you're not using a super complicated scene, I sometimes render a native C4D standard or physical pass with no lights or GI afterwards. The masks are super-sharp and the render only takes a couple of seconds.

Same here. Sometimes it´s faster and easier to do so instead of fixing masks in Photoshop. Maybe you can save time with render presets with the right settings so you don´t have to set them up manually every time.

Title: Re: Material ID
Post by: hughannes on 2019-05-29, 08:43:21

Thank you both for the tips.

Yes, we started using C4D's masks as well.
I was hoping for an easy fix. I'd love using Coronas ID pass.