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Backface Normals
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Description
To prevent objects from appearing all flat on the back side where there is no light contribution the lighting algorithm has been slightly changed. Now back faces also receive some normal induced lighting. This image shows a comparison between front faces and back faces where it can be seen how there is still lighting detail on back faces.
But... what is it?
bump-mapping
Looks like a Liger. Damn, childhood seems so far away now...
@Rebornx: Normal mapping to be precise.
@Ninjadave,zar27: It's the Shield Liger model I once started working on as a high detail modeling learning experience ( Youtube.com , Youtube.com ).
Good idea because it's annoying when the normal maps don't work with no light.