Why do I get two warning signs when using particle shape mode and often crash in GPU mode

[RaynerR]

When using particle shape mode, the Arnold preview window will prompt two warnings related to "opacity", but I have removed the option for model opacity and it will still be displayed. Is this normal?

Cinema 4D often crashes when rendering previews and moving perspectives or modifying models in Arnold GPU mode.

[peter_horvath]

> When using particle shape mode, the Arnold preview window will prompt two warnings related to "opacity", but I have removed the option for model opacity and it will still be displayed. Is this normal?

Yes, this is expected. It's an internal thing, the opacity parameter is deprecated on the shapes, but the plugin still sets it when instancing. You can ignore this warning.

[peter_horvath]

> Cinema 4D often crashes when rendering previews and moving perspectives or modifying models in Arnold GPU mode.

Do you have a reliable way to reproduce these crashes or do they happen randomly?

[RaynerR]

Thank you for your reply. It seems that Arnold will not actively release the graphics memory in GPU mode, and it will freeze after using up my resources.

[peter_horvath · Accepted solution]

Would you mind to check out the latest release, C4DtoA 4.7.4? We have fixed a GPU memory leak in that build.

[RaynerR]

Thank you for the update. I will try the new version. Arnold is an excellent renderer, and I hope it can become even better!