You can open a lot of 3ds files together, scale and rotate the 3ds-objects, walk around and inside the 3ds-objects, use four arrow buttons for rotate or walk around the object, use "plus" and "minus" buttons on numpad for scale the object, and use "Man" button on toolbar for switching "walk" or "look" mode.
LicenseFree to try
File Size4.61 MB
Operating System Windows XP Windows NT Windows 98 Windows 2003 Windows Vista Windows Windows 2000 Windows 7 Windows Me