multires modifiers makes mesh invisible after leaving sculpting mode #36591
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Reference: blender/blender#36591
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%%%--- Operating System, Graphics card ---
Linux 64 bit (mageia3), AMD HD7770 (latest catalyst)
2.68a
after scuplting a 83M Triangle mesh, going back to object mode will make the mesh invisible (viewport performance was very fluid in sculptmode, subdivision level are the same for viewport, sculpt and rendering)
I can't attach a blend file because of size.
Side notes : Deactivating "outline selected" automatically while entering sculpt mode would be a really nice Idea as it improves performance greatly and many users (even advanced) don't know it. A warning about VBO not activated would help as well. Many of us learned about it while talking on Blenderartists about dynatopo improvements. And many people just stop sculpting because they think the performance are too bad, which is just only due to bad options.
%%%
Changed status to: 'Open'
%%%Couldn't make object disappear when leaving sculpt mode here. Maybe it's somehow driver-specific, any chances you might test the issue on NVidia card?
Will answer for side notes:
%%%I have seen a few of those reports with mesh artifacts after leaving sculpt mode and I think I have a lead to the cause. For sculpt mode, usually one vertex buffer per leaf node is allocated, while in object mode, one vertex buffer is allocated for the entire mesh. What this comes down to is that we may be hitting vertex buffer size limits outside sculpt mode, while a mesh can work perfectly fine inside sculpt mode. What might work is querying OpenGL for this limit and using more than one buffer to draw the object if using just one is impossible.%%%
%%%@Seregey, sorry I guess I wanted to say deactivate outline selected for object linked to the sculpted mesh. Otherwise, the performance drops heavily on leaving sculpt mode. For VBO, I didn't know. For testing on Nvidia hardware, I go back to school in the coming weeks, I'll try to test there.%%%
@Psy-Fi, if i understand you correct, it's a specific of some opengl behavior? Moving yo opengl tracker then..
Changed status from 'Open' to: 'Archived'
Well, not even ogl tracker, just a design limitation of the pbvh. Added a note there http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Tools#Sculpting