Incorrect CULL behavior when scattering vegetation

**D5 Render Version: 3.1.1.0758
**Graphics Card: 3070 mobile
**Driver Version: last
Issue Description:
Screenshots/Videos Description:
Steps to Reproduce (optional):
I’m trying to scatter grass, and there’s one thing that bothers me. I’m using D5 together with 3ds Max.

So, in the scene, I have two objects from 3ds Max: the main scene itself and the trees, which I imported into D5 as a separate object.

I don’t understand why, when I scatter the vegetation with the imported “Trees” object turned off, the grass covers the entire lawn area. But when I turn “Trees” on, the grass stops growing underneath them, leaving a large bald patch!

When the trees are not present or are turned off, everything works fine.

Is there any way to control this behavior?