ANT eroder + adaptive subdivision causes crash
Closed, ArchivedPublic

Description

System Information
Win 10
GTX titan

Blender Version
2.79

Short description of error
ANT eroder (vertex weight tool) + adaptive subdivision causes crash or freeze when rendering

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

1-Create a landscape with the new ANT landscape tool (huge improvement, thx). Give it a material with true subdivision. Add subdiv modifier with adaptive subdivision
2- Preview it in cycles ----> everything is OK

NOW
3-Go to weight paint mode. Weights>Landscape eroder. Vertex groups are added based on geometry
4-Retry preview in cycles : Crash or freeze during Tesselation operation (denser meshes tend to crash)

Details

Type
Bug
Brendon Murphy (meta-androcto) triaged this task as Confirmed priority.Sep 13 2017, 6:37 PM

hi, provided file indeed crashes, opened file, pressed render, stalled my entire computer, requiring manual shutdown of computer. literally locked up my whole system, no mouse, no keyboard.
don't try this with works in progress.

Jimmy Haze, ant author: "i have tried to replicate the 'adaptive subdivision' crash, but without succes, dont know yet what coases it, it works ok when i trie.
I do found that when you open the provided file Mountain.blend, and you then switch from catmul clark to simple subdivision in the modifier, the crash wont happen."
also to note there are many variables in place here, distance to camera, relatively high vert count could all be factors.
at this time we cannot fix but we are aware that there's something amiss in the workflow and will keep in mind to test for blender 2.8
Closing as archived,