Moving Light Shaders

Shader properties and configuration for moving head stage lights

Overview

Moving light shaders simulate professional moving head stage lights with pan/tilt control, GOBO projection, color mixing, and volumetric light cones. Available in Standard Mover, Wash Mover, and Laser variants.

Shader Paths

DMX Control

• VRSL/Standard Mover/Projection
• VRSL/Standard Mover/Volumetric
• VRSL/Standard Mover/Fixture
• VRSL/Wash Mover/Projection
• VRSL/Wash Mover/Volumetric
• VRSL/Basic Laser/DMX

AudioLink Control

• VRSL/AudioLink/Standard Mover/Projection
• VRSL/AudioLink/Standard Mover/Volumetric
• VRSL/AudioLink/Wash Mover/Projection
• VRSL/AudioLink/Wash Mover/Volumetric

Core Properties

DMX Configuration

_DMXChannel · int · default: "0"

Starting DMX channel for the fixture (0-512). Each fixture uses 13 channels in standard mode.

_NineUniverseMode · bool · default: "false"

Enable extended universe mode for addressing fixtures beyond 512 channels. Supports up to 9 DMX universes (4608 channels).

_EnableDMX · bool · default: "false"

Enable DMX control via render texture input. When disabled, uses manual property control.

_EnableCompatibilityMode · bool · default: "false"

Enable legacy DMX grid reading method for backward compatibility with older versions.

_EnableVerticalMode · bool · default: "false"

Switch DMX grid reading from horizontal to vertical layout.

Movement Controls

_FixtureBaseRotationY · float · default: "0"

Pan offset in degrees. Adjusts the base pan rotation of the fixture.

_FixtureRotationX · float · default: "0"

Tilt offset in degrees. Adjusts the base tilt rotation of the fixture.

_MaxMinPanAngle · float · default: "180"

Maximum pan angle range (-x to +x degrees). Typical values: 180°, 270°, 540°.

_MaxMinTiltAngle · float · default: "180"

Maximum tilt angle range (-y to +y degrees). Typical values: 90°, 180°, 270°.

_PanInvert · bool · default: "false"

Invert pan direction. Useful for fixtures mounted in different orientations.

_TiltInvert · bool · default: "false"

Invert tilt direction.

_FixtureRotationOrigin · vector · default: "(0, 0.014709, -1.02868, 0)"

Pivot point for pan/tilt rotation in object space. Should align with the fixture’s physical rotation point.

Intensity and Color

_FinalIntensity · float · default: "1"

Master intensity multiplier for the fixture. Affects all output.

_GlobalIntensity · float · default: "1"

Global intensity control shared across all fixtures.

_GlobalIntensityBlend · float · default: "1"

Blend factor between local and global intensity.

_UniversalIntensity · float · default: "1"

Universal intensity multiplier applied to entire scene.

_Emission · color · default: "(1,1,1,1)"

Light color tint (HDR). Multiplied with DMX color values.

_FixtureMaxIntensity · float · default: "1"

Maximum light intensity output. Higher values increase bloom and brightness.

_Saturation · float · default: "1"

Color saturation of the light output.

_SaturationLength · float · default: "0.1"

Falloff distance for saturation effects.

_RedMultiplier · float · default: "1"

Red channel intensity multiplier for color correction.

_GreenMultiplier · float · default: "1"

Green channel intensity multiplier.

_BlueMultiplier · float · default: "1"

Blue channel intensity multiplier.

Projection Properties

_ProjectionSelection · int · default: "0"

Selected GOBO pattern index. 0 = no gobo, 1-8 = GOBO patterns.

_ProjectionMainTex · texture · default: "white"

GOBO texture for projection pattern. Supports up to 8 different GOBO textures.

_ProjectionIntensity · float · default: "0"

Intensity multiplier for projected GOBO pattern.

_ProjectionRotation · float · default: "0"

Static rotation angle of the projection in degrees.

_EnableSpin · bool · default: "false"

Enable automatic GOBO rotation animation.

_SpinSpeed · float · default: "0"

Speed of automatic GOBO rotation.

_ProjectionUVMod · float · default: "0"

UV scale modifier for GOBO 1. Adjusts projection size.

_ProjectionUVMod2 · float · default: "0"

UV scale modifier for GOBO 2.

_ProjectionFade · float · default: "0"

Edge fade for projection. Higher values create softer edges.

_ProjectionFadeCurve · float · default: "1"

Harshness/curve of the projection edge fade.

_ProjectionDistanceFallOff · float · default: "0.05"

Distance-based intensity falloff for projections.

_ProjectionRange · float · default: "0"

Drawing range for projection. Scales the projection mesh.

_ProjectionCutoff · float · default: "0.25"

Cutoff threshold for projection visibility.

_ProjectionShadowHarshness · float · default: "0"

Harshness of projected shadows in the GOBO pattern.

_MinimumBeamRadius · float · default: "1"

Minimum beam radius at the origin point.

_LegacyGoboRange · bool · default: "false"

Use legacy GOBO indexing range for backward compatibility.

Cone Properties

_ConeWidth · float · default: "0"

Width/spread of the light cone.

_ConeLength · float · default: "1"

Length of the visible light cone.

_MaxConeLength · float · default: "1"

Maximum cone length when using DMX control.

_ConeSync · float · default: "0.2"

Synchronization factor between cone width and length.

_EnableExtraChannels · bool · default: "false"

Enable DMX control of cone length via additional channel.

Strobe Settings

_EnableStrobe · bool · default: "false"

Enable strobe effect support.

_StrobeFreq · float · default: "1"

Strobe frequency in Hz when manually controlled.

Rendering Options

_RenderMode · enum · default: "1"

Transparency rendering mode:

• 0: HQTransparent (volumetric only)
• 1: Transparent
• 2: AlphaToCoverage

_BlendSrc · enum · default: "2"

Source blend mode (Unity BlendMode enum).

_BlendDst · enum · default: "1"

Destination blend mode.

_BlendOp · enum · default: "0"

Blend operation (Unity BlendOp enum).

_ZWrite · bool · default: "false"

Enable depth buffer writing.

_AlphaToCoverage · bool · default: "false"

Enable alpha to coverage for MSAA transparency.

_ClippingThreshold · float · default: "0.5"

Alpha clipping threshold for alpha to coverage mode.

_MultiSampleDepth · bool · default: "true"

Enable multi-sample depth texture reading for better quality.

Advanced Grid Options

_UseRawGrid · bool · default: "false"

Use raw unsmoothed DMX grid for intensity and color. Bypasses interpolation for instant response.

AudioLink Specific Properties

_EnableAudioLink · bool · default: "false"

Enable AudioLink audio reactivity.

_Band · enum · default: "0"

AudioLink frequency band:

• 0: Bass
• 1: Low Mids
• 2: High Mids
• 3: Treble

_BandMultiplier · float · default: "1"

Intensity multiplier for the selected frequency band.

_Delay · float · default: "0"

Time delay for AudioLink response.

_NumBands · float · default: "4"

Number of frequency bands to sample.

_EnableColorChord · bool · default: "false"

Enable ColorChord color tinting from AudioLink.

_EnableColorTextureSample · bool · default: "false"

Enable sampling color from a texture instead of AudioLink.

_SamplingTexture · texture · default: "white"

Texture to sample color from when color texture sampling is enabled.

_TextureColorSampleX · float · default: "0.5"

X coordinate for color texture sampling.

_TextureColorSampleY · float · default: "0.5"

Y coordinate for color texture sampling.

_EnableThemeColorSampling · bool · default: "false"

Enable AudioLink theme color sampling.

_ThemeColorTarget · int · default: "0"

Target theme color slot to sample from AudioLink.

Usage Examples

Basic Setup

1. Assign the Projection shader to the projection mesh
2. Assign the Volumetric shader to the volumetric cone mesh
3. Set _DMXChannel to the starting channel (e.g., 0 for channel 1)
4. Enable _EnableDMX if using DMX control
5. Adjust _FixtureMaxIntensity to control brightness

GOBO Configuration

1. Assign GOBO texture to _ProjectionMainTex
2. Set _ProjectionIntensity to control brightness
3. Adjust _ProjectionUVMod to scale the pattern
4. Use _ProjectionRotation for static rotation
5. Enable _EnableSpin for animated rotation

Performance Optimization

For better performance on lower-end systems:

• Set _RenderMode to 1 (Transparent)
• Keep _ProjectionIntensity moderate
• Reduce _ConeLength to minimize overdraw
• Disable unnecessary features like _EnableSpin

See Also

• Volumetric Rendering - Detailed volumetric properties
• Shader Overview - System architecture
• Static Lights - Static light shaders