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Maniphest T67628

Different Particle Physics Render with Evee and Cycles?
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Description

System Information
Operating system: Ubuntu 18.04
Graphics card: NVIDIA Geforce GTX 1080 (two)

Blender Version
Broken: 2.80 RC2
Worked: (optional)

From the "lowpoly rocket" project on cgcookie.com:
After creating two renders, one with Evee, and one with Cycles, the Cycles particle physics is dramatically different.

Evee: https://www.jimby.name/vids/R102_EVEE0001-0300.mp4

Cycles: https://www.jimby.name/vids/R102_CYCLES0014-0120.mp4

Attached is a simplified blend file. I removed non-essential objects.

bugreport01.blend1 MBDownload

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Event Timeline

Jim Brown (jimbyb) created this task.Jul 25 2019, 12:30 AM
Jim Brown (jimbyb) updated the task description. (Show Details)Jul 25 2019, 12:35 AM
Jim Brown (jimbyb) updated the task description. (Show Details)Jul 26 2019, 4:16 PM
Sebastian Parborg (zeddb) assigned this task to Sergey Sharybin (sergey).Aug 5 2019, 2:46 PM
Sebastian Parborg (zeddb) lowered the priority of this task from 90 to 50.
Sebastian Parborg (zeddb) added subscribers: Sergey Sharybin (sergey), Sebastian Parborg (zeddb).

@Sergey Sharybin (sergey) It doesn't simulate correctly with render animation (both cycles/eevee). It only works if you have baked the particle system. I could have sworn we already had an issue with this, but I can't find it :/

Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).Aug 5 2019, 3:20 PM

Might be a T58521 [havent checked though]?

Sergey Sharybin (sergey) added a comment.Aug 5 2019, 3:26 PM

Particle dynamics is to be baked prior to render, otherwise it's hard to give predictable results.

Sergey Sharybin (sergey) closed this task as a duplicate of T58521: Animation render does not show physics unless baked.Aug 5 2019, 3:27 PM