1. Epic GamesDeveloper
  3. ConservativeDensity

ConservativeDensity

This is a 3-components float vector.

API > API/Runtime > API/Runtime/Engine > API/Runtime/Engine/Materials > API/Runtime/Engine/Materials/UMaterialExpressionVolumetricAdv-_1

Syntax

FExpressionInput ConservativeDensity

Remarks

This is a 3-components float vector. The X component must represent the participating medium conservative density. This is used to accelerate the ray marching by early skipping expensive material evaluation. For example, a simple top down 2D density texture would be enough to help by not evaluating the material in empty regions. The Y and Z components can contain parameters that can be recovered during the material evaluation using the VolumetricAdvancedMaterialInput node. Evaluated per sample.

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