Slow camera view navigation in Cycles rendered shading mode with many instances #92233

New Issue

slowburn · 2021-10-15T14:04:05+02:00

slowburn commented

2021-10-15 14:04:05 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.68

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-13 21:57, hash: 9dff3de6ac
Worked: 2.93

Short description of error
When looking through camera and navigating the viewport (with Lock Camera to View for example), the movement is much slower than a regular perspective view. This happens in rendered shading mode with Cycles, when many object instances are in the scene. Instances can be generated with Geometry Nodes or the old particle system. Also they don't even have to be visible on screen, you could be looking at a single cube somewhere to the side, and the camera navigation will still be slow.
camera navigation bug.blend

Exact steps for others to reproduce the error

Use the provided file
Switch to rendered mode and disable overlays
Try looking around
Switch to camera view

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.68 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-13 21:57, hash: `9dff3de6ac` Worked: 2.93 **Short description of error** When looking through camera and navigating the viewport (with Lock Camera to View for example), the movement is much slower than a regular perspective view. This happens in rendered shading mode with Cycles, when many object instances are in the scene. Instances can be generated with Geometry Nodes or the old particle system. Also they don't even have to be visible on screen, you could be looking at a single cube somewhere to the side, and the camera navigation will still be slow. [camera navigation bug.blend](https://archive.blender.org/developer/F11137232/camera_navigation_bug.blend) **Exact steps for others to reproduce the error** - Use the provided file - Switch to rendered mode and disable overlays - Try looking around - Switch to camera view # Navigation should be much slower and unresponsive

slowburn commented

2021-10-15 14:04:05 +02:00

Added subscriber: @slowburn

blender-admin commented

2021-10-15 14:04:05 +02:00

#98257 was marked as duplicate of this issue

blender-admin commented

2021-10-15 14:04:05 +02:00

#97721 was marked as duplicate of this issue

blender-admin commented

2021-10-15 14:04:05 +02:00

#93976 was marked as duplicate of this issue

slowburn changed title from ~~Slow camera view navigation in rendered shading mode with many instances~~ to Slow camera view navigation in Cycles rendered shading mode with many instances

2021-10-15 14:07:42 +02:00

William Leeson commented

2021-10-18 16:17:31 +02:00

Added subscriber: @leesonw

William Leeson commented

2021-10-18 16:17:31 +02:00

I don't seem to experience this on the latest build. Can you try that to see if it is fixed for you?

slowburn commented

2021-10-18 18:19:54 +02:00

I tried today's build (452c78757f) and the problem is still there.
It also happens when using CPU to render, so it's probably unrelated to GPU drivers or something like that.

I tried today's build (452c78757f44) and the problem is still there. It also happens when using CPU to render, so it's probably unrelated to GPU drivers or something like that.

Alaska commented

2021-10-19 03:49:44 +02:00

Added subscriber: @Alaska

Alaska commented

2021-10-19 03:49:44 +02:00

I can confirm a performance decrease when moving the camera compared to just moving around the viewport

System Information
Operating system: Linux-5.14.0-2-amd64-x86_64-with-glibc2.33 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 470.63.01
Blender version: 3.0.0 Alpha, branch: master, commit date: 2021-10-19 01:13, hash: a3457704fb

I can confirm a performance decrease when moving the camera compared to just moving around the viewport **System Information** Operating system: Linux-5.14.0-2-amd64-x86_64-with-glibc2.33 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 470.63.01 Blender version: 3.0.0 Alpha, branch: master, commit date: 2021-10-19 01:13, hash: `a3457704fb`

William Leeson commented

2021-10-19 09:20:34 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'