Alt+Z Solid Viewport Shading fast (>60fps) at first, but then slow (~15-20fps)
Closed, ArchivedPublic

Description

System Information
Win7 64bit, NVIDIA GeForce GTX TITAN X 12GB

Tested on Blender 2.79, 2.78c, 2.77a, happens in all of them.

Exact steps for others to reproduce the error
BLEND FILE:
http://pasteall.org/blend/index.php?id=48173

  • Put on animation playback, Alt+A
  • On Solid Viewport Shading, the fps should be 60fps or more when panning and orbiting around in Blender
  • Put on Textured Viewport Shading, Alt+Z, goes to really slow 1-2fps, which is expected, I guess, which sucks -> moving on
  • Put on again Solid Viewport Shading, Alt+Z, goes to ~15-20fps, which is undesired and weird, since it just was over 60 fps
  • If you select one of the mesh-branches and do Undo, Ctrl+Z, the speed jumps up to more than 60fps, which is desired

So, something happens when you go out of Textured Viewport shading mode, something is dragging down the fps for Solid Viewport Shading, until you do the Undo.

Details

Type
Bug
Sergey Sharybin (sergey) closed this task as Archived.Oct 31 2017, 10:44 AM
Sergey Sharybin (sergey) claimed this task.

While i can reproduce the issue and it is legitimate bug in master branch, the way how viewport works is totally changed in blender2.8 branch, so fixing this issue in a code which is really reaching EOL does not seem productive ti me. Would wather spend time on finishing dependency graph and other projects in 2.8 and make 2.8 an official master :)

So thanks for the report, but afraid it's just something you'll need to live with for a bit more

Thanks, sounds good :)

2.8 is going to be awesome!