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Android VR: black faces when getting closer to object

Hello, I have an issue with rendering 3d scans for Android VR (32k triangles) I have different objects: a giraffe, a dino. Some objects always render conrrectly, some, tend to have black triangles moving on the surface when I approach the camera. Different builds of the same scene sometimes (rarely) don't have the bug. I'm using mobile HDR.

  • some shaders (giraffe) work on every objects

  • some shaders (hammer 2) fail on every scan objects, but worked on a simple SM sphere.

  • some shaders fail only sometimes (dino)

  • some objects, fail with new shader, but not with some other (hammer works with Giraffe.

  • within the shader, just using the BC map reproduces the problem.

  • giraffe and hammer shaders are instances of the same material

  • copy of giraffe simple also fails

  • having 2 objects with same shader in the scene fixes the problem (added a dino static mesh close to camera)

  • isse is distance related: closer gets darker.

  • Some objects (lady) don't show black, but a colofrul layer that looks like a mixture of UV gradient and ORM pass.

  • Dino seems to have problem after going through the LODs

I am a bit at my wit's end on this. If anyone has experienced this, I'd be grateful to hear about your hindsight. I have not built for non VR android before, so I am not sure if it is linked to VR or android port. alt text

Product Version: UE 4.20
dinobug2.jpg (40.0 kB)
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asked Jan 18 '19 at 12:02 AM in Rendering

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There is always a tick box. I wish I didn't try about everything else before trying this one. Disabling texture streaming fixed it for me.

Menu>Project settings>rendering> disable texture streaming

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answered Jan 18 '19 at 07:06 PM

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