Light v1.2.1

Summary

Light is a light source tool for the POPX Path Tracer's direct lighting system. It functions similarly to TouchDesigner's built-in Light COMP but provides light parameters specifically designed for the Path Tracer's physically-based rendering pipeline.

The Light tool supports four light types: Point Light for omnidirectional illumination, Spot Light with cone angle and falloff controls, Area Light for soft rectangular illumination, and Volumetric Light for atmospheric light effects with ray marching. Each light can be configured with color, intensity, distance attenuation, and optional texture projection.

Light tools are referenced by the Path Tracer operator through the Light Comp parameter in the Lights sequence on the Lights page.

Parameters

Page: Light

Light Color Color – – RGB color of the light.
Light Color Colorr
Light Color Colorg
Light Color Colorb
Dimmer Dimmer – Light intensity multiplier.
Light Type Type – – Selects the type of light source.
Point Light point
Spot Light spot
Area Light area
Volumetric Light volumetric
Bi-Directional Bidirectional – Area and spot lights emit from both sides of surface.
Cone Angle Coneangle – Spotlight cone angle in degrees.
Cone Delta Conedelta – Spotlight falloff width at cone edge.
Cone Rolloff Coneroll – Spotlight intensity falloff curve.
Volumetric Steps Volsteps – Number of ray marching steps for volumetric light evaluation.
Volumetric Density Scale Voldensityscale – Multiplier for volumetric light density.
Distance-Attenuated Attenuated – Enables distance-based light intensity falloff.
Attenuation Start Attenuationstart – Distance at which light attenuation begins.
Attenuation End Attenuationend – Distance at which light attenuation reaches zero.
Attenuation Rolloff Attenuationexp – Exponent controlling the attenuation falloff curve.
Texture Map Texturemap – Texture map projected from the light source.

Page: Common

Free Extra GPU Memory Freeextragpumem – Free memory that has accumulated when output memory has grown and shrunk.