Hello,
here is problem with dimension mask - If i set a mask and create a dimension then the text is unreadable before end of command - see screen below. This problem is independet of mask colore.
For starters, can you post the output of the SystemInfo command?
Yes, of course.
Rhino 6 SR2 2018-3-6 (Rhino 6, 6.2.18065.11031, Git hash:master @ cd4fa1dcdec31cb58baacef0855771173af7196f)
Windows 7 SP1 (Physical RAM: 16Gb)
GeForce GTX 650 Ti BOOST/PCIe/SSE2 (OpenGL ver:4.6.0 NVIDIA 388.71)
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: Height
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 12-15-2017
Driver Version: 23.21.13.8871
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 2 GB