Week 03 - Relight GSplat with normal lights workaround
Apr 05 - 12, 2026
Relight GSplat with normal lights
Develop a workaround solution for relighting Gaussian Splats without having to bake the lights into color attribute in Houdini
Result
Create objects in obj level then use as a mesh light in Solaris
Create objects in obj level then use as a mesh light in Solaris
Process
Original Gaussian Splats
Convert to VDB using VBD from Particles node
Smooth the VBD and convert to polygon
Project the polygon to the original points by using Attribute Transfer to transfer position from original Gaussian Splats points to the polygon
Smooth out the surface
Use Relax node to bring the detail back
Run VEX code on the original Gaussian Splats point to flatten the color, removing highlight and shadow
Transfer flatten colors to the polygon
Overall nodes structure
Set up lighting on the geometry and render just combined Diffuse pass from Houdini Karma
Compositing the lighting on unlit Gaussian Splats (rendering on V-Ray) in Nuke