when working in rendered perspective view, every now and then the viewport stops working, and shows just a white background and some random black lines. I restart the program and open the same file again, and everything comes back to normal… any solutions for the rendered view to stop crashing in the firsplace?
Hi @protdriva
Start by running the SystemInfo command in Rhino and post the result here. That could give people a clue to what might be going on. A good guess would be out-dated graphics drivers, but post the result and we’ll see 
HTH, Jakob
Rhino 7 SR5 2021-4-10 (Rhino 7, 7.5.21100.03001, Git hash:master @ 2cd158094b595f6400479d7cbe511454b6149527)
License type: Commercial, build 2021-04-10
License details: Cloud Zoo
Windows 10.0.19042 SR0.0 or greater (Physical RAM: 7.9Gb)
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: Intel(R) HD Graphics 4600 (Intel) Memory: 1GB, Driver date: 10-16-2017 (M-D-Y). OpenGL Ver: 4.3.0 - Build 20.19.15.4835
> Integrated graphics device with 3 adapter port(s)
- Windows Main Display attached to adapter port #0
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: Intel
Render version: 4.3
Shading Language: 4.30 - Build 20.19.15.4835
Driver Date: 10-16-2017
Driver Version: 20.19.15.4835
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 1 GB
Rhino plugins that do not ship with Rhino
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RPC.rhp “RPC”
C:\Program Files\Rhino 7\Plug-ins\AnimationTools.rhp “AnimationTools”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.5.21100.3001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
Yeah, so that driver is not just old, it’s ancient! You should check for updates every 2-3 months, just to be sure. Go HERE for an updated driver. Also, that’s not really a fitting grahics card for running any sort of 3D program on (and it’s from 2013) - Rhino 7 is best of with at least 4GB of VRAM. But still, an updated driver hopefully will get rid of the crashes.
HTH, Jakob
thank you!