Operating system: Win10 with 32GB RAM
Graphics card: 2080Ti
2.81, 2.83 (sub 2), branch: master, commit date: 2020-02-04 23:04, hash: rB79003fa0c415
Short description of error
Cycles in CUDA mode.
Enabling the Show Stereo option (in the temporary Render Window) seriously slows down rendering.
Exact steps for others to reproduce the error
- Open attached file
- Enable Stereoscopy
- Render and note time
- Disable Show Stereo (in the image editor topbar)
- Render and compare time
Rendering attached file with 1 eye: 5s (so you would expect a stereo render to be ~10s)
Rendering attached file with in stereo with show_stereo_3d on: 45s.
Rendering attached file with in stereo with show_stereo_3d off: 10s
It's clear that displaying the anaglyph view significantly slows down rendering at high resolution.