Radius The radius of the sphere that emits light in all directions. Increasing the Radius will soften the lit region edge and the shadows casted by the spot light.
Visible to Camera Makes the light source visible to the camera (a.k.a primary rays). Since the point light is rendered as a sphere with the specified Radius, the visible shape will be sphere. Note that a Radius of 0, might still produce a very tiny visible dot.Point Light Controls
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