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Blender Discussions

inputhone
Adept I
‎06-13-2019 09:51 AM

RPR Principled Shader Roughness at 0

Hello. When putting Roughness to 0 on a Metallic Material Setting (Using a Metallic map here, so it's set to 0 or 1) for Principled Shader in Blender 2.8 on MACOS  10.14.5 using a Vega 64 AMD as external EGPU the material gets white. Using Blender 2.8 latest built from june and also latest built of RPR. See Pictures below for Reference.

Bildschirmfoto 2019-06-13 um 16.45.40.png   Bildschirmfoto 2019-06-13 um 16.45.28.png

This doesnt happen in Cycles, and therefor can be a bit of a pain when switching between the two. Anybody else experiencing this? Hope i could save someone else some time.

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2 Replies
bsavery
Staff
Staff
‎06-14-2019 03:01 PM

Please attach a simple scene

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gelert
Elite
‎07-03-2019 05:10 AM

This is the VEGA macOS driver or Metal 2 issue in 10.14.5 (and all betas for 10.14.5).... it is, however, fixed in the 10.14.6b2 onwards and in Catalina.

If you render this with a Polaris AMD GPU (e.g. RX 580) it will render 100% correctly in 10.14.5.

I'm suffering with this issue too. Hopefully macOS 10.14.6 will be out soon.