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All Projects → raganmd → touchdesigner_light_volume

raganmd / touchdesigner_light_volume

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TouchDesigner Light Volumes

Contributors

Author | Michael Walczyk
Adapted by | Matthew Ragan

Platform

Light Volumnes is a simple shader intended to help create the illusion of faux lighing volumns, similar to what you'd see in haze. This implimentation is a 2D post process effect achieved in a shader. Controls for this tox are exposed as Custom Parameters.

Features and Parameters

Textures

Parameter Description and Function
Volume Color The color image to be used for generating the faux volume
Scene This represents your rendered scene. This could be created using only TOPs, or it could be a 3D rendered scene
Light Source This should be an image where the light sources are represeted as all white textures.

Volume Settings

Parameter Description and Function
Light Position The UV position of your light source in UV space.
Decay The roll-off of the light over distance.
Weight The strength / brigntess of lighting accumulation
Density The accumulation range and direction. Positive values come "towards" the viewport, negative values move away
Exposure Exposure control before output - a brightness dial.
Samples The number of steps in the ray-marching process.
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