Importing v-ray scene into unreal material error

Development Rendering
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1

I have a v-ray scene from 3DS Max that I import into Unreal Engine using DataSmith. Most of the scene gets imported well. But I notice this issue with transparent textures. There are few materials that flicker like seen in this video. Does anyone know why this is happening?
TIA

2

Hi!

Are you sure it’s not z fighting? (duplicated mesh or polygons overlapping?)