particles + motion blur cause artifacts
Open, ConfirmedPublic

Description

Win 10, GTX1080, i7-7700K 4.20Ghz
Blender 2.79, 2.78c, Cycles

See attached file. There are baked particles included. Hit render. There's a clear shadowy artifact across the mesh in Cycles render. The problem does not appear in Cycles preview.


The problem is gone when layer with particles is hidden. The problem is also gone when motion blur is turned off.

When I try to render on CPU, Blender crashes.

Details

Type
Bug

I confirm the bug happens on ubuntu 16.04, too. 2.79 and master 556b13f

Problem is not present with CPU rendering. It only occurs when GPU is involved.
It is more obvious with CPU+GPU.

ronan ducluzeau (zeauro) triaged this task as Confirmed priority.Nov 16 2017, 1:58 PM
Marcin Twarowski (Tvaroog) raised the priority of this task from Confirmed to Needs Triage.Nov 16 2017, 2:01 PM
Marcin Twarowski (Tvaroog) updated the task description. (Show Details)
Marcin Twarowski (Tvaroog) triaged this task as Confirmed priority.Nov 16 2017, 2:25 PM
Marcin Twarowski (Tvaroog) renamed this task from particles + motion blur cause artifacts on Windows 10 to particles + motion blur cause artifacts.Dec 2 2017, 11:54 AM