1-2s lag when using scroll wheel button to orbit #89142

New Issue

nameless · 2021-06-14T15:17:52+02:00

nameless commented

2021-06-14 15:17:52 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.11

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8

Short description of error
1-2s lag when using scroll wheel button to orbit

Exact steps for others to reproduce the error

hold mouse scroll wheel to start orbiting
1-2s lag/freeze occurs before it starts orbiting
if you hold on viewport gizmo (the colorful XYZ thingy in top right corner of viewport), it orbits with 0 delay

Video demo: https://files.catbox.moe/yp0mq0.mp4
First, I orbit with viewport gizmo (you can see when I'm holding mouse click, cursor disappears - orbit start lag is 0, then I start orbiting with scroll wheel button - you can see delay between mouse cursor movement (I try to hold scroll wheel and move at the same time) and viewport orbiting (around 1-2 seconds).

If Volume Scatter is disconnected in World shader, scroll wheel click lag doesn't occur. So it seems that issue is related to volumetric and inconsistency how it reacts to scroll wheel button vs viewport gizmo orbiting, despite them doing the same function.

I think this bug was occurring also in 2.91 and 2.92 (I noticed this bug around end of 2020)

Test File:

buggedOrbit.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.11 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` **Short description of error** 1-2s lag when using scroll wheel button to orbit **Exact steps for others to reproduce the error** 1. hold mouse scroll wheel to start orbiting 2. 1-2s lag/freeze occurs before it starts orbiting 3. if you hold on viewport gizmo (the colorful XYZ thingy in top right corner of viewport), it orbits with 0 delay Video demo: https://files.catbox.moe/yp0mq0.mp4 First, I orbit with viewport gizmo (you can see when I'm holding mouse click, cursor disappears - orbit start lag is 0, then I start orbiting with scroll wheel button - you can see delay between mouse cursor movement (I try to hold scroll wheel and move at the same time) and viewport orbiting (around 1-2 seconds). If Volume Scatter is disconnected in World shader, scroll wheel click lag doesn't occur. So it seems that issue is related to volumetric and inconsistency how it reacts to scroll wheel button vs viewport gizmo orbiting, despite them doing the same function. I think this bug was occurring also in 2.91 and 2.92 (I noticed this bug around end of 2020) Test File: [buggedOrbit.blend](https://archive.blender.org/developer/F10270068/buggedOrbit.blend)

nameless commented

2021-06-14 15:17:52 +02:00

Added subscriber: @tonpix

Pratik Borhade commented

2021-08-06 08:37:48 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-08-06 10:37:45 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Pratik Borhade commented

2021-08-06 10:37:45 +02:00

Thanks for the report. I can notice a little lag with blender-v2.93-release branch build.

Try disabling add-ons on broken version if some extra add-ons are checked and see if that helps.

If issue happens on multiple device then possibly it's related to the system. In that case upgrading the OS or driver may fix the issue

Please also add the system info file generated from the help menu: Help -> Save System Info

Thanks for the report. I can notice a little lag with `blender-v2.93-release` branch build. Try disabling add-ons on broken version if some extra add-ons are checked and see if that helps. If issue happens on multiple device then possibly it's related to the system. In that case upgrading the OS or [driver ](https://docs.blender.org/manual/en/latest/troubleshooting/gpu/#windows) may fix the issue Please also add the system info file generated from the help menu: `Help -> Save System Info`

nameless commented

2021-08-16 12:20:31 +02:00

Found the culprit via trials/errors:

It's Depth option in Orbit & Pan settings. If I disable it, the lag is gone. For some reason, when it's enabled, orbiting introduces 1-2s initial lag when using mouse scroll wheel click, but not when using the gizmo in viewport top-right corner. I believe it requires investigating in blender code (I've disabled all addons, didn't help until I found Depth option).

system-info.txt attached

system-info.txt

Found the culprit via trials/errors: It's Depth option in Orbit & Pan settings. If I disable it, the lag is gone. For some reason, when it's enabled, orbiting introduces 1-2s initial lag when using mouse scroll wheel click, but not when using the gizmo in viewport top-right corner. I believe it requires investigating in blender code (I've disabled all addons, didn't help until I found Depth option). system-info.txt attached ![image.png](https://archive.blender.org/developer/F10283810/image.png) [system-info.txt](https://archive.blender.org/developer/F10283813/system-info.txt)

Pratik Borhade commented

2021-08-16 12:48:28 +02:00

@tonpix , thanks for clarifying. In that case the issue is similar to: #73827 which was merged in #68206 (Lag reading viewport depth buffer in LookDev mode)

Pratik Borhade commented

2021-08-16 15:02:33 +02:00

Closed as duplicate of #68206

Pratik Borhade closed this issue

2021-08-16 15:02:33 +02:00

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1-2s lag when using scroll wheel button to orbit #89142