What are distance fields used for and why are they used?

Development Rendering
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1

Hey everyone,

As the question suggests, I’m not sure why or what distance fields are used for.

Can somebody please explain this to me?

Thanks guys!
Goolog

2

The best possible answer to your question, assuming you are talking about Mesh Distance Fields:

Now, if you are talking about Distance Field Ambient Occlusion, here is the best explanation: