In order to design hot 3d designs on the web, used swift3d... swift3d can make 3d animation in a second and can be exported to .swf files or flash files. Using this software makes your websites looks more professional. Also if you want to design 3d landscape INSTANTLY used corel bryce. I used this software to make 3d wallpapers, banners, background and more. I'll post all software i used in graphic designing, animation, and 3d modelling...

Graphic Designing: Adobe Photoshop, Corel Draw/Photopaint, Ulead PhotoImpact, Macromedia Fireworks, Jasc Photoshop

Animation: Macromedia Flash, Swish MX

3d Modelling/Animation: Maya, Swift3d, CorelBryce

Using all this software makes you powerfull designer

Thanks...