Emissive

glTF: emissiveFactor · emissiveTexture

The emissive property controls the color and intensity of light emitted by the surface, independent of scene lighting.

Shader	Color attribute	Intensity attribute	Notes
standardSurface, aiStandardSurface	emissionColor	emission
openPBRSurface	emissionColor	emissionLuminance	Different intensity attribute name
StingrayPBS	emissive	emissive_intensity	Uses TEX_emissive_map + use_emissive_map for texture

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Factor only

Set the emissive color and intensity directly on the shader.

• standardSurface, aiStandardSurface: set emissionColor and emission.
• openPBRSurface: set emissionColor and emissionLuminance.
• StingrayPBS: set emissive and emissive_intensity.

Exports as emissiveFactor. If intensity exceeds 1.0, KHR_materials_emissive_strength is also written. Exports as emissiveFactor. If the resolved emissive result exceeds 1.0 in any channel, the exporter normalizes emissiveFactor and also writes KHR_materials_emissive_strength.

standardSurfaceaiStandardSurfaceopenPBRSurfaceStingrayPBS

standardSurface factor-only emissive setup.

aiStandardSurface factor-only emissive setup.

openPBRSurface factor-only emissive setup.

StingrayPBS factor-only emissive setup.

Note

An intensity of 0.0 exports with no visible emission.

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Texture only

Color space: sRGB

standardSurface · aiStandardSurface · openPBRSurface:
  aiImage.outColor  →  shader.emissionColor
  file.outColor     →  shader.emissionColor

StingrayPBS:
  file.outColor  →  shader.TEX_emissive_map  (enable use_emissive_map)

Also keep the intensity attribute (emission, emissionLuminance, or emissive_intensity) above 0.0.

Exports as emissiveTexture with a neutral white emissiveFactor unless a tint is also set.

standardSurfaceaiStandardSurfaceopenPBRSurfaceStingrayPBS

standardSurface texture-only emissive setup.

aiStandardSurface texture-only emissive setup.

openPBRSurface texture-only emissive setup.

StingrayPBS texture-only emissive setup.

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Factor + texture (tint)

glTF computes: emissiveFactor × emissiveTexture

When KHR_materials_emissive_strength is present, the final emissive result is additionally scaled by emissiveStrength.

For standardSurface, aiStandardSurface, openPBRSurface:

1. Connect texture.outColor → colorComposite.colorA.
2. Set the tint on colorComposite.colorB.
3. Set colorComposite to multiply mode.
4. Connect colorComposite.outColor → shader.emissionColor.
5. Set the intensity attribute above 0.0.

The colorComposite node carries the exported emissiveFactor tint. The shader intensity attribute (emission, emissionLuminance, or emissive_intensity) carries emissive strength, not the tint factor.

standardSurface · aiStandardSurface · openPBRSurface:
  texture.outColor  →  colorComposite.colorA  →  shader.emissionColor

For StingrayPBS: connect the texture to TEX_emissive_map (enable use_emissive_map), set the tint on emissive, and set intensity with emissive_intensity.

The tint exports as emissiveFactor. If tint multiplied by intensity resolves above 1.0 in any channel, the exporter writes a normalized emissiveFactor plus KHR_materials_emissive_strength.

standardSurfaceaiStandardSurfaceopenPBRSurfaceStingrayPBS

standardSurface factor-plus-texture emissive setup.

aiStandardSurface factor-plus-texture emissive setup.

openPBRSurface factor-plus-texture emissive setup.

StingrayPBS factor-plus-texture emissive setup.

Note

Changing the shader swatch while a texture is connected does not create a separate exported tint. Use the colorComposite setup above.

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UV transform

file nodes: set repeat, wrap, mirror, offset, and rotation on the connected place2dTexture.
aiImage nodes: wrap, scale, and offset export natively; rotation requires a place2dTexture.

UV set: assign via Maya's UV Set Editor or UV Linking - see UV Set Selection for node-type differences.

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Notes

• Emissive is a color map. Always use sRGB color space.
• Keep the intensity attribute above 0.0 - a value of 0.0 disables emission on export.
• The exporter writes KHR_materials_emissive_strength when the resolved emissive result exceeds 1.0 in any channel.
• StingrayPBS uses its own dedicated emissive workflow through TEX_emissive_map, use_emissive_map, emissive, and emissive_intensity.