Procedural lightnings HDA

Advanced Lightning creation HDA in Houdini (scientifically correct explainer video).

Allow to switch between negative and positive cg return strokes and allow for their different shape and lighting animation
The HDA will create the initial curve automatically either from 2 points, 1 point + a ground, or use a defined curve. It adds the forks at the tip of the leaders.

The HDA has full error control and output passes for external compositing. Indeed, this was also the opportunity to test some updated workflow with Redshift AOVs, rendering in ACEScg and compositing passes in Davinci Resolve color page from an ACES multilayer EXRs (not using the traditionnal Fusion/Nuke comp approach).