Only artifacts on display

i just installed the latest WIP and i only get artifacts displayed. Even when i start a new file, the first line doens’t shows up where it’s drawn…

In the attached image, a circle (center 0,0 radius 5) and a triangle (doted lines show correct form, only when selected)

This is my system information:
Rhino 6 SR0 2017-7-18 (Rhino WIP, 6.0.17199.12041, Git hash:master @ 9201f554befe8a516130e036d13ce4f65a915cd0)

Windows 7 SP1 (Physical RAM: 7.9Gb)

Intel® HD Graphics 4600 (OpenGL ver:4.3.0 - Build

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

Anti-alias mode: 4x
Mip Map Filtering: None
Anisotropic Filtering Mode: None

Vendor Name: Intel
Render version: 4.3
Shading Language: 4.30 - Build
Driver Date: 3-23-2016
Driver Version:
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 1 GB

C:\Program Files\Rhino WIP\Plug-ins\Commands.rhp “Commands”
C:\Program Files\Rhino WIP\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino WIP\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino WIP\Plug-ins\rdk_etoui.rhp “RDK_EtoUI”
C:\Program Files\Rhino WIP\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino WIP\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino WIP\Plug-ins\CyclesForRhino.rhp “Cycles for Rhino”
C:\Program Files\Rhino WIP\Plug-ins\RhinoCycles.rhp “RhinoCycles”
C:\Program Files\Rhino WIP\Plug-ins\Toolbars\Toolbars.rhp “Toolbars”
C:\Program Files\Rhino WIP\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino WIP\Plug-ins\Displacement.rhp “Displacement”

I suppose that the first thing to try is to update your GPU drivers.

Hi Heiko - can you please open Options > View > OpenGL and change the setting for ‘GPU Tessellation’ Does that make any difference?


Problem isn’t solved with the latest drivers (support discontinued…).

Unchecking the GPU Telssellation solves the problem, thanks!

While that might work, it’s not really a solution :wink:
As far as I can tell, GPU tessellation should work fine for an Intel GPU running OpenGL 4.0 and later. Yours appears to be using OpenGL 4.3.0.
CC: @stevebaer

Unfortunately some of the Intel drivers suffer from this problem and I have been able to repeat it. I was by default disabling GPU tessellation on Intel drivers that only supported up to GL 4.0; looks like I may have to do so with the ones that only go up to 4.3. My Intel driver supports GL 4.4 and works great with the feature.

I tried the latest driver for my chipset with windows 7 support and the one before it, both supporting OpenGL 4.3, same result with both, i have to disable tessellation.
In Rhino 5 there is no problem, graphic seems much faster.

It’s a bug in the Intel driver and unfortunately I don’t have any good contact information at Intel to tell them about this bug. Nvidia and AMD drivers appear to work with this feature. I do know that the newer Intel Iris drivers also work with GPU tessellation enabled, but that is probably a different GPU than what you have. If it weren’t for this driver bug, I wouldn’t even make a checkbox option on the OpenGL settings page and just always keep the feature enabled.

Sorry, but I don’t have high hopes of fixing GPU tessellation for your specific GPU.

All that said; wire drawing should be very similar to V5 speed when this feature is disabled.