Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] Daily Builds => Topic started by: Chules on 2025-05-29, 16:56:41
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With the april update of Chaos Cosmos with the release of the latest version of corona c4d macOS, chaos cosmos objects are downloaded with a canl of SSS material that makes render times increase a little bit (actually it increases a lot the pre-calculation and the render only a little bit in print) and the interactive render times increase a lot, being impossible to use it.
I have made a comparison with the same objects downloaded 1 month ago, and the same old object does not have the SSS channel in the materials and the same object downloaded now has it. This has happened to me in a scene with several vegetation objects and the scene has become almost impossible to handle with interactive renders.
I think it's due to a bug and it's activating this channel in materials that don't need it. I have tried to go object by object and material by material deactivating this SSS channel and when I do this exercise cinema 4d closes with an error in the corona plugin.
Is it possible that this is a bug and not a problem with my equipment?
My computer is macOS 15.4 Studio M1 Ultra. I have tried it on other computers and the result is unfortunately the same.
I hope you can help me.
Thanks for the support and this wonderful render engine, thanks for not forgetting the macOS users.
Suggestion: study the options of implementing rendering through chaos cloud. Chaos Vantage for macOS.
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Can you let us know the error that C4D closes with, and send us the scene (best done via ticket at https://support.chaos.com/requests/new), and any generated minidump, see https://support.chaos.com/hc/en-us/articles/4648898278545-How-to-report-issues-C4D for where to find / how to capture one of those.
While the material set up looks a little odd, it should have no effect on render times because it's mapped and the value being sent in from the map is zero. I tested rendering with it as the material comes in (nothing in the scene but a plane, sun sky, and these jugs) and it was 11s, and I then disabled SSS in the material, and render time was 11s. I then re-enabled SSS and removed the (empty/black/zero) mixture shader map leaving the Fraction at 100% now rather than zero, and render time was 38s. I changed Fraction to 0%, and render time was 11s. So basically a Fraction of zero is the same as not having the SSS block enabled in the shader.
This means it should not be causing you a slowdown. And of course, it shouldn't be causing a crash either, and indeed I was able to change the SSS for these objects just fine :) I am on Windows I should note.