How do I work effeciently pyro instance with substeps?

[Sari_Y]

Hi Houdini guys,

I'm doing a Pyro simulation using the instance function because of the smoke&fire of a long trail. I've instructed to create 10 clusters, but there are more than double as many containers created in the scene. The reason is that I'm increasing the sub steps in Dop network.  I confirmed that the sub-step of 1 produced the specified number of clusters.

However, I need to keep the substeps because the emitters are moving fast and the flames need to look nice in my scene.  Is it possible to generate a container only for integer frames?

If u have suggestion, I'm highly appreciate it.

Thanks!

[vicvvsh]

Hi, you can create an attribute on cluster points in a wrangle sop i.e:

@creationtime = @Time;

then a blast sop with expression:

@creationtime<`@Time`

place these two nodes at the end of a branch of nodes before the node, which is the reference of clusters points for smoke object dop. It will keep cluster points on first substep only and will delete on the others.

[Sari_Y]

Thank you vicvvsh ! It works perfectly. super cool!