VRayProxy object and imported Sketchup object texture issues.

Hi I currently have 2 issues. It’ll be better to ask with screen captures!

1. On the ceiling, I was using VrayProxy object for modeling exposed ceiling. But some have right color on Vantage but some don’t. It seems like flipped objects are rendered in black texture on Vantage. Why is it like that and how to solve it?

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2. Similar issue but different case..I had many objects in the kitchen but only this oven conveyor has an issue. It was originally sketchup skp file. I imported it to the 3ds Max scene then I converted to Editable Poly and edited it.
When rendered with Vray, it didn’t have a problem but when rendered with Vantage, its textures are all black like the other VrayProxy issue above.. Can I get an advice about why it’s like this?

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Hi byunggoan_kim1,

Can you please send us the scene or just the problematic objects in max so we can investigate? You can use the chaos support center to open a ticket and when we received and examine it - will report back.

Best regards,
Alexander