Indoor Graphical Artifacts

Encountered this a couple times now. Its odd and inconsistent.

Indoor Graphical Artifacts

Odd artifacts sometimes appear when objects interact with lighting.

OS: Windows 8.1, Nvidia GT 650M(2)

Repro steps: Occasionally encountered indoors with lighting, screenshots attached.

Visibility: Occasionally, Encountered twice in several hours.

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We are looking at ways of smoothing the shadows out. Right now this is a compromise for better framerate in the interiors.