brian burke

pretty straightforward to do using the ‘detail’ expression in the intensity parameter of your light. if your attribute promote node was in ‘geo1’ and named ‘attribpromote1’ that would look like

if you jump down into your motionfx chop network, you can find the chop that's exporting back to your animated parameters. its visible by having the orange export flag enabled, on the left side of the chop node. to bake this chop to keyframes, left click on it and navigate to ‘save’. from the ‘save’ submenu, you can select ‘edit data channels’. this will pop up the fit to keyframes dialog. if you set the fitting tolerance to 0 from the ‘fit panel’ and click ‘copy to export destination’, you will bake your motionfx to keyframes.



the export chop has the orange flag

hope this helps!
b

hi tamte. i don't know about a mantra property for this, but thresholding the surface field in the shader and rendering that as density works to do what you are describing.

here's an example: