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Redshift Volume Shader Overview

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Core Concepts: Volume shader renders heterogeneous objects like clouds and smoke using voxel data
Shading consists of Scatter, Absorption, and Emission components
Volume objects must be stored fully on GPU memory
Scattering and Absorption: Scatter controls volume brightness through light scattering
Absorption determines volume opacity and light transmission
Scatter and absorption coefficients must be balanced for realistic results
Emission: Emission creates effects like fire and explosions
Uses temperature channel for physically correct rendering
Color ramp or Blackbody mode available for emission control
Advanced Features: Volume trace depth controls multiple scattering effect
Shadow density scale simulates multiple scattering without affecting shape
Extinction Falloff enables realistic multiscatter without performance penalty
Range remapping allows adjusting OpenVDB channel values
Implementation: Requires at least one channel from volume object
Needs volume contribution set to greater than 0
Compatible only with Brute Force global illumination
Cinema 4D 2023.1 includes Pyro Volume material preset