looking for some free basic 3D software
downloaded Sketch up but looks a bit in depth,
any other free programs? it's just for playing with house and garden designs
In terms of time and quality of output, Sketch Up is probably the fastest and easiest visual realization package available. Once you learn how to use it properly, architectural projects can come together within a matter of minutes - it has single handedly revolutionized the architecture industry as an idea can spring to life in real time.
It is not a difficult program to master, however it will take a week or two to become used to the methodology and process of building objects, but trust me once mastered you will become an addict. when your doing the tutorials, pay particular attention to the process of building objects - big time saver. Also, try to autosave you work every 5-10 minutes..
Like WolfCreekPsycho mentioned, Kerkythea is probably the easiest post-production rendering program that can render stills and animations. They have also just released an internal version of Kerkythea called Twilight that works from within Sketchup - I have began using it and I have to say, its an outstanding program. But you can use both to get a desired result, depending on the project.
Make sure you install the SU2KT plugin so you can export directly into kerkythea if not using twilight (they use the same render engine but are totally separate programs)
You can also use Blender which is also free, its a kinda hybrid program cross between skethup and kerkythea, in that you can build things and render them within one convenient program. They are now using this software to make animated flicks too:
http://www.youtube.com/watch?v=HomAZcKm3Jo
http://www.blender.org/
http://twilightrender.com/
http://www.kerkythea.net/joomla/
Plugin:
http://www.kerkythea.net/joomla/index.php?option=com_remository&Itemid=42&func=fileinfo&id=112