Objects on a sloped surface become very dark when using VrayDirt

[Alex_M]

I'm having a weird problem with VrayDirt. If I apply it to a Forest Pack object that is scattered on a sloped surface, VrayDirt makes only the objects that are sloped darker than they should be. Please check the screenshot below. Any idea why this is happening and how to avoid it?

[hermit.crab]

Mind if you simplify and send the scene?

[Alex_M]

No problem. I've just submitted a ticket number 284291 with the simplified scene.