Sony Vegas 12 visual effects not showing in viewer window


Jul 14, 2014
I have a project I am rendering which is an interview with 3 different camera angles. The lighting/ colour is slightly different on each of them, so I want to apply some filters/corrections to them to make them all as close as possible.

The problem: When I apply a visual effect, it doesn't actively get shown in the viewer window. The colour stays the same, and it is only when I render it just so the actually outcome gets displayed. I know this isn't right, you must be able to make changes and see the instant effect as you do it in the viewer so you can tweak and change as you go, rather than test rendering 50 times before finding a good setting...

Can anyone help me out?
Have you checked the preview window options to make sure FX Bypassed is not enabled?