Shading errors with AO

any clues what causes this and how to avoid?

I am dealing with a lot of unpredictable behavior when using the AO shader.
It seems to get problematic on certain viewing angles/distances.


Can you please run the SystemInfo command in Rhino and post the results in a reply?

sure thing:

Rhino 6 SR19 2019-10-22 (Rhino 6, 6.19.19295.01001, Git hash:master @ 0af62045bd35259d4c2367dbf7f9ef94ded29299)
License type: Educational, build 2019-10-22
License details: Cloud Zoo. In use by: Daniel ()

Windows 7 SP1 (Physical RAM: 48Gb)
Machine name: KRAKEN

Non-hybrid graphics.
Primary display and OpenGL: NVIDIA GeForce GTX TITAN X (NVidia) Memory: 12GB, Driver date: 9-26-2019 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 436.48

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 9-26-2019
Driver Version:
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 12 GB

Rhino plugins
C:\Program Files\Rhino 6\Plug-ins\SolidTools.rhp “SolidTools”
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.19.19295.1001
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RPC.rhp “RPC”
C:\Program Files\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\ColorPicker (336da4ab-03d3-42ca-b1fb-313bfd4c1157)\2019.2.15.811\ColorPicker.rhp “ColorPicker”
C:\Program Files\Rhino 6\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Next Limit\Maxwell for Rhino\maxwell_rhino.rhp “Maxwell for Rhino”
C:\Users\dkerbler\Downloads\elefront421\ElefrontProperties.rhp “ElefrontProperties”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.19.19295.1001
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.19.19295.1001
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.19.19295.1001
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\BlockEdit.rhp “BlockEdit” 6.19.19295.1001
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\SectionTools (fbdb1d7f-8cfb-42c1-9858-87cb6315932c)\2019.2.19.478\SectionTools.rhp “SectionTools”