Hi everyone,

I've been using SketchUp for a while, but I'm new to making animations. I'm trying to animate a walkthrough of an interior courtyard, and I've been running into the infamous "shadow flashing" problem. After searching the web, I've found some people saying that this problem didn't exist in SketchUp 4, and that it's possible to create an animation in SketchUp 4 with a model from a newer version of SketchUp, avoiding the shadow problem.
My questions for the board would be:

1. Is this true? (And if it is are there any special tricks or problems to be aware of?

2. Is it still possible to download SketchUp 4? I looked around but I can't seem to find it.

Thanks a lot for the help! Hopefully I can get this to work...