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# Materials: VMap Commands {#mat_vmap}
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## vmap_lightimage
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### Syntax
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**vmap_lightImage <texturepath>**
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### Overview
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By default, surface lights use the average color of the source image to
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generate the color of the light. vmap_lightImage specifies an alternate
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image to be used for light color emission, radiosity color emission,
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light filtering and alpha shadows. You can even use a light image with a
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different alpha channel for blurrier alpha shadows. The light color is
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averaged from the referenced texture. The texture must be the same size
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as the base image map. vmap_lightImage should appear before
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qer_editorImage.
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