Differential D15501
Weight Paint: use coordinates from normal evaluated mesh if same topology. Authored by Alexander Gavrilov (angavrilov) on Jul 20 2022, 2:26 PM.
Details Weight and Vertex paint don't change coordinates and thus don't need Since painting uses original topology, the deform only mesh is used,
Diff Detail
Event TimelineComment Actions What does this mean for artists? What practical problem is being solved by this change?
Comment Actions Being able to use geometry nodes or weight mix modifiers to enforce complex custom weight layering during weight painting (in my case, enforcing a helper bone being painted to take exactly 50/50 split of weight from its two master bones). The way it is currently is nasty and confusing, because the viewport draws the fully evaluated mesh, but painting uses pure deform that completely excludes all weight manipulation. Edit: the root issue is that the whole concept of 'deform only' is naive and obsolete, because it fails to take account of the existence of non-deform (e.g. weight mix) or generic (geometry nodes can have any effect depending on the nodes) modifiers.
Comment Actions Potentially a cleaner solution is to change BKE_crazyspace_build_sculpt to evaluate non-deforming modifiers, and speculatively evaluate Geometry Nodes (i.e. evaluate, then discard the result if it changed topology), but it's obviously complicated. This simply special cases the situation when the whole modifier stack doesn't change the topology and full crazyspace data isn't needed. Comment Actions TL;DR: If it is tested and works correct then it is fine short-term solution. To my knowledge the paint/texturing projects are looking into some deeper changes in PBVH, so eventually this code might not be necessary anymore. Avoiding crazyspace and other evaluations is always good for the painting performance. | ||||||||||||||||