Alexander Gavrilov
c1fd97f15d
Commit rB709ca0ece changed how rotation was handled for particles so that unless actual rotation physics is enabled, there is no rotation. However it only updated ptcache_particle_read, forgetting to change exactly the same code in ptcache_particle_interpolate. This means that for subframes old code that computes a rotation from velocity is used, resulting in completely different rotation than for integer frames. This causes rotational motion blur by itself, and also mangles motion blur paths of child particles. Reviewers: sergey, lukastoenne Maniphest Tasks: T45936 Differential Revision: https://developer.blender.org/D2124