Particle Info node and Displacement Crash
Closed, ResolvedPublic

Description

System Information
OS Name: Microsoft Windows 7 Professional
Version: 6.1.7601 Service Pack 1 Build 7601
Processor: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz, 3401 Mhz, 4 Core(s), 4 Logical Processor(s)
Graphics Chipset: AMD Radeon (TM) R9 380 Series

Blender Version
Broken: 2.79 5bd8ac9
Broken: 2.79 001789d (latest on builder.blender.org)

Description
In the official release version of blender, opening the attached blend file will trigger a crash. This blend file contains a node setup utilizing the true displacement option in Cycles Experimental.
The instant crash occurs because the material tab is open and Blender attempts to refresh the preview image. If the materials tab is not open the instant crash does not occur, but CPU renders will crash.

When using the latest compile for 2.79, blender does not immediately crash when opening this file. But attempting to make any modification of the node setup or starting a full CPU render will trigger a crash.
With one exception: removing the Particle Info node. If this is done then the crash does not occur.

If this material is used on an actual particle (particle system set to use an object with the given material), the crash occurs with the first frame that a particle appears in the scene.

The problem does not seem to happen immediately. After creating the node setup, rendering will actually work, but saving and restarting Blender produces this behavior. Also removing the Particle Info node and replacing it will sometimes get it to work for a few renders (but that's quite random).

Here's the weird part. If the GPU is used, renders do not trigger a crash! (So thankfully I've been able to continue my project.)

Stoician (littlebob) renamed this task from Particle Info node and Displacement to Particle Info node and Displacement Crash.
Mai Lavelle (maiself) closed this task as Resolved.Jan 19 2018, 4:51 AM
Mai Lavelle (maiself) claimed this task.