Volumetric Shadows for Particles

Volumetric Shadows for Particles is used to draw animated particle effects like smoke, steam, and dust with volumetric shadows for a dynamic light source. Volumetric shadows provide important visual cues that enhance realism. A modern approach to the conventional slice-based technique is used in order to achieve high performance, flexibility, and quality.

Before the particles are drawn, a volumetric shadow map is built. The particles are drawn once or twice from the view point of the light using multiple render targets. For 6 and 12 slices, the particles are drawn once. For 24 slices, the particles are drawn one addition time. The shadow map is used to draw the particles and surfaces in the scene with volumetric shadows.

Demos:

• 12SliceFire Windows
• 12SliceFireOrtho Windows
• 24SliceSmoke Windows

• 12SliceFire Mac
• 12SliceFireOrtho Mac
• 24SliceSmoke Mac

Documentation

Key Features: -Choose between 6, 12, and 24 slices

-Choose between an orthographic directional light or a perspective spotlight

-Control the appearance and quality of volumetric shadows for particle effects

-Supports soft particles

-Supports emissive effects like fire

-Includes custom surface shading with normal mapping

-Supports Unity's soft and hard shadows for shadowing surfaces

-Includes a solution for casting solid surface shadows on particles

-Compatible with and tested on Windows and Mac operating systems

-Compatible with Direct3D (9 and above) and OpenGL (2.1 and above)

Requires at least Shader Model 3.0

Not recommended for most mobile devices.

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