[Stiglr]

1) Questions like these are better posted in the General section; they have nothing to do with development.

2) You do not have to pay for many upgrades, but when there are major version releases, that will necessitate an upgrade fee. I've had AC3D for about 3 years, and had at least 5 upgrades I didn't pay for. One major upgrade, where the user interface was dramatically changed, had to be paid for.

However, for the price it's still one of the biggest bargains in 3D.

3) AC3D does not support animations at all.