We still have no idea when the sci-fi sequel Riddick might start production, although, we have a new concept art illustration from actor Vin Diesel. The actor revealed on his Facebook page that director David Twohy shared the photo as a birthday present, which shows the title character roaming a desolate landscape. Click on the illustration below to access our growing concept art gallery from Riddick.

<strong><em>Riddick</em></strong> Concept Art