I needed to demonstrate the difference in diffuse and specular illumination
caused by the area_light of POV-Ray (which simply uses a point light for
those) compared to a true grid of pointlights with a simple scene.
  Even though simple, the result was so nice that I decided to post it here.

  The first image uses just an area_light. The second image creates a
grid of pointlights equivalent to the area_light (ie same amount of
points). The second image was, naturally, several times slower to
render.

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Attachments:
Download 'arealight.jpg' (29 KB) Download 'lightgrid.jpg' (28 KB)

Preview of image 'arealight.jpg'

Preview of image 'lightgrid.jpg'