Hello,

I have been trying to get this to work for me for a couple days now and I have seriously come to a wall. I've tapped out every resource I have other than this one in order to find the answer. If anyone can take a look at this file and help me out it would be truly amazing and I would be very thankful indeed!

WHAT I HAVE DONE:

I am trying to use a gas diffuse node to blend the colors of the fluid particles being emitted from two separate emitters. The first emitter is a polygon sphere using impulse activation and impulse birth rate. The second emitter is a default emitter using stream activation.

I have appended a color attribute to the POP networks inside of each of the particle fluid emitters in the DOP network. For the sphere emitter I have appended the color attribute to the POP network entitled “PARTICLE_SOURCE_POP”. For the default emitter I have appended the color attribute to the POP network entitled “PARTICLE_STREAM_PREBUILT”.

WHAT WORKS:

I have applied the gas diffuse node to the merge node connecting the two emitters, and have set the gas diffuse node to be the first in the order of operations for the merge node. The blend of colors is working fine.

THE PROBLEM:

My problem is that the sphere emitter is set to stop birthing particles after frame 2, but it keeps emitting particles as though it is referencing the default emitter somehow. I see the initial particles of the sphere emitter stop on frame 2, but then starting of frame 3 they begin to emit using the parameters established in the other emitter.

SOME QUESTIONS THIS ISSUE HAS FORCED ME TO PONDER

1. Is this an issue with order of operations in the merge node somehow?

2. Can you use two emitters of different types in the same simulation?

3. Is there some parameter in which one emitter is referencing the other that I don't know about?

4. Is there some issue with the way that the particle fluid object attached to the particle fluid solver is treating the two separate emitters.


I tried to make this as easy to understand as possible and I am including the Houdini file. Any help on this would be super amazing.

respectfully,

Adam