Hello there.
I am having some difficulties with the indirect illumination or color bleeding coming from grass material.
In the attached pic you can see the green color is coming from an outside object with grass material.
How can I control this, except temporarily changing the grass material ? It's not possible to hide the grass object.
Thank you
not much activity in the Archicad part of the forum 
Thanks a lot for your message uisanata , in the first instance, can you please make sure that the Rendering Quality in the Visual Settings -> General tab is not only set to "Draft"? You may be able to resolve this already by setting it to "Medium" or even "High"/"Ultra" if your system allows it.
If that doesn't help, is there any chance you could send me the project actually?
Thanks a lot for your message uisanata , in the first instance, can you please make sure that the Rendering Quality in the Visual Settings -> General tab is not only set to "Draft"? You may be able to resolve this already by setting it to "Medium" or even "High"/"Ultra" if your system allows it.
If that doesn't help, is there any chance you could send me the project actually?
Thanks for the reply. In fact I use only Ultra settings.
I can't share the model unfortunately, I will try to replicate in a duplicate file.
The wooden thing between the steel bars and the outside grass might be too high poly. Either reduce the polycount or try to add a low poly shell in it.
We will also try to reduce this kind of light bleeding behavior. This is a non-ArchiCAD specific problem.
