what do you think is best software in 3d desgining
Blender 3D! And it is free!
Sketchup 3d or 3ds max ,both are very good + sketchup has a large 3d library where you can find a lots of other people modes ,if you cant aford those then I would recomend Blender its free ,and there are lot of tutorials out there.
In order to post an answer, you need to sign in.