Robert Farmeadow

To access neighbors, you need to calculate their positions relative to the current one. Since voxels are on a grid, you do this by offsetting the voxel coordinates. Houdini provides the volumeindex VEX function [www.sidefx.com] to help you read values from a volume at specific voxel coordinates.

fixed it. I have removed the gasdissipate microsolver from inside the pyrosolver and used the dissipation setting on the pyrosolver settings which seemed to fix it. I'll check what I did wrong on that gasdissipate solver later today.

Tanto
Impossible to know from your screenshot, please post your Solaris network, or (even better) your hip file.

Here's my hip.