I've had this concept for nice looking 3D fog for ages. Figured it was time to try it out with Construct, since it's so easy to make stuff with it.
Up arrow moves forward.
Right and left to turn. Turning will make you go in a diagonal, could fix that but it's not really important.... just turn in place and see how it looks like.
[url:x97kw8at]http://octavoarte.cl/fog_concept.exe[/url:x97kw8at]