Speed issue in Vizard
 

I am using some very basic brick wall virtual environments, some of which have 3D objects in, some of which don't. Whenever I run an environment with 3D objects in, the speed is quite unreliable and jolts at different times when 'walking' through the environment.

Any know why this may be and how to resolve the problem?

What are the specs of the machine you're using? What kind of graphics card do you have?