How to make a light start at a circle instead of a point?

Development Rendering
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1

Hello there friends, I am wondering if anyone knows of a way to create a light that starts with a circle instead of a point?

This is called Lens Radius in Maya. Say I am making a spotlight, I want the light to start at the entire radius of the model of the spot light, not a direct point. Is this possible?

Thank you,

Brandon

2

Hi!

I think this is what you’re looking for:

3

I appreciate this, but I aim aiming for dynamic. More so for volumetric lighting, i want it to start more a circle than a tiny point