RT Irradiance
In: Filters/Effects
Complex
Description
Generates ray traced irradiance on a height map input generated from an environment map and an emissive map. Can be used to “bake” lighting into a texture inside a graph. Used for fake global illumination and glow.This node should not be used in combination with the CPU (SSE) engine due to computation time. Returns two maps: one Irradiance output where the irradiance is applied to the material inputs, one raw irradiance map containing just the calculated irradiance values.
Parameters
Inputs
- Height: Grayscale inputHeight is the only required input from the material slot. Without it, the node will not function well.
- Emissive: Color inputEmissive should be in a format where pure black emits no light, any other colored value emits light. Alpha is ignored. A connection to this slot, or the Environment slot is required to see any result.
- Environment: Color Input
HDR Lighting environment to compute the irradiance with. A connection to this slot, or the Emissive slot is required to see any result.
Parameters
- Height Scale: 0.0 - 1.0
Scale to interpret height at. Affects entire scene look. - Quality: 32 rays, 64 rays, 128 rays
Determines result quality, but also affects performance. Less rays means more noise. - Compute Bounces: False/True
Toggle computing of bounces. Affects quality and speed. - Environment Rotation: 0.0 - 1.0
Rotate the environment around. - Environment Exposure (EV): -4.0 - 4.0
Exposure value to use for environment, affects total brightness of effect. - Emissive Intensity: 0.0 - 20.0
Multiplier for the Emissive input, affects strength of irradiance from emissive. - Emissive Color Space: sRGB, Linear
Colorspace used to interpret the Enissive input. - IBL Shadows in Raw Irradiance Alpha: False/True
Toggle wether to add Shadows to the - Emissive LOD Bias: -1.0 - 1.0Tune Quality of the emissive irradiance. Lower value means more noise.
Example Images
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