mapVizShape node

User Guide > Rendering and Render Setup > Lighting > Lighting nodes > Photon and final gather nodes >

mapVizShape node

When you generate a photon or final gather visualization map, the mapVizShape shape node is added to the scene. Adjust the attributes of this node to change the visualization map. For more information, see Photon maps and also See the distribution of photons.

Photon Visibility

If the map is a photon map, turning any of these options off hides the corresponding photon type.

Options

Point Size: This is the size of light rays on the surface to be drawn in screen space.
Normal Scale: Each photon and final gather point has an associated normal that tells which side of a surface it is on. Raise Normal Scale above zero to display normals.
Direction Scale: Raise Direction Scale to display the direction from which photons arrived on the surface.
Search Radius Scale: Irradiance is estimated from a photon map by looking up photons within a certain radius. MapViz automatically determines a good search radius for visualization. That radius can be scaled by Search Radius Scale.