Summary

Title:PFlow will not sim without a Lucid object in the scene (Collision excluded).
Category:Crash/Critical
Status:Open
Posted By:Qba ( Q'ba )
Date Created:2 October 2015

Problem

Description:

Particle Flow particles will be stuck on the emitter and not simulate unless there's an object with a Lucid modifier in the scene (set to something other than Collision).

 

Tested on 3ds max 2014 and 2016, Lucid builds 0.0.3.5071 and 0.0.4.5173

Steps to Reproduce:

1. Create a basic Pflow.

2. Add Lucid Operator to the main Event

3. (Optional) Create a box, invert normals, add Lucid Modifier and set it to Collision (for simulation bounds)

3. Toggle Lucid Physics or Record Lucid Physics

Result: Particles are stuck to the emitter or occasionally (seems to be random) fall down very slowly. After a few toggles of the Lucid Physics button, Max will crash

4. Create a sphere (or any other mesh). apply a Lucid Modifer and set it to Rigid (or anything except for Collision)

5. Toggle Lucid Physics or Record Lucid Physics

Result: Particles simulate correctly.

I cannot reproduce this on 0.0.4 given the steps provided. Toggling Lucid and scrubbing produces properly falling particles and multiple toggles don't cause a crash here.

Marsel Khadiyev (Software Developer, EPHERE Inc.)

Here's a .max file that exhibits the problem. It's max 2014 - toggling the Lucid Modifier on Sphere001 on and off shows the issue. With the modifier off, particles are stuck on the emitter. With the modifier on, they simulate properly.

 

I'm starting to suspect it might be my test system - the issue seems quite fundamental and more people should've stumbled upon it if it was a bug in the plugin - I have no idea how to troubleshoot it though. Both my max and graphics card drivers are up to date - max 2014 is patched to SP5, my graphics card is a GTX 660 Ti with driver version 347.09. I'm on Windows 7 64-bit.


Attached Files:

>Lucid_PFlow_Issue_Qba_02.max (610304 bytes),