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I want to create a viewshed analysis with Blender. Something like this:

enter image description here

I tried it using light in Blender Render and Cycles but I can't get it to work due to the light fall off. I have already set the light bounces to 0.

enter image description here

enter image description here

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You can do that easier in a compositing step.

  1. Choose whichever renderer.
  2. In the Rendering Tab of the Properties Editor, activate the Shadow Pass.

The shadow pass hold exactly that information: where light hits and where not. The intensity isn't relevant. It is also antialiased.

enter code here

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