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Above is the link to Moritz's tutorial using curl generated from velocity of voxels to manipulate the geometry of flip fluid.

After generating 'curl' from the node VDBanalysis, he typed in the following expressions:

float curlamp = length(v@vel);
curlamp = fit(curlamp, 0, 50, 0,1);
f@curlamp = curlamp;


I have difficulty in understanding how this can add details to the geometry of the fluid. Is curlamp a built-in Houdini attribute that can influence geometry?

I think what the above three line expression did was only define a new point vector attribute and have it added to the spreadsheet.

Please help!