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You can do it this way: Texture Coordinate (Object output) > Mapping > Gradient Texture (Radial mode) > ColorRamp > (that begins and ends with the same color) > Emission > Material Output. To make the color spin, use the Mapping Z Rotation value:
You can do it this way: Texture Coordinate (Object output) > Mapping > Gradient Texture > ColorRamp > Emission > Material Output. To make the color spin, use the Mapping Z Rotation value:
You can do it this way: Texture Coordinate (Object output) > Mapping > Gradient Texture (Radial mode) > ColorRamp (that begins and ends with the same color) > Emission > Material Output. To make the color spin, use the Mapping Z Rotation value:
You can do it this way: Texture Coordinate (Object output) > Mapping > Gradient Texture > ColorRamp > Emission > Material Output. To make the color spin, use the Mapping Z Rotation value: