HI all i have a bunch of glass balls with lights in the balls falling from the sky and rolling away.
So i have a lot of null objects which contain a sphere and a light i have used a constraint on the light so it will stick to the ball. The animation looks like it works i.e. when i select render current active view every few seconds in the animation the lights are still inside the balls but when i render a preview the lights drift away from the balls. I have tried clamp and psr constraints and both seem to work except when i render a preview, maybe its an expression thing or I'm missing something in my dynamics. Any ideas Cheers Emmet