I have always preferred 'Imagine 3D PPC/68k' for all my rendering needs on Amiga platforms. Unfortunately MorphOS still has a few compatibility issues with this software that makes it unusable.

For instance try this:
1. create a new project
2. head into the action editor
3. try clicking on any of the actor,pos,align,size bars

The info window comes up with the gadgets misplaced into the upper left corner of the screen. There is no way to interact with the user interface from that point on even though the software does not actually lock up.

Imagine is 90% working perfectly except for that main annoying issue with certain info windows. I was working on something of a workaround for this problem but haven't had time to finish it as of yet. (I have to write a whole new action editor replacement since I have no idea how to hack/patch this problem in another way)

Lightwave 3D has been my alternative in the mean time but I would really like to see Imagine fully working again. Blender, Cinema4D and Aladdin4D haven't really worked too well for me for various reasons. Real3D is a pretty powerful piece fo software but takes a lot of time and effort to achieve good results.