Leeh14 "stereoscopic"
Dark Basic already provides a 3d world.
Stereo photos (use this search term on the web) are used to make 2d images look 3d. Colour anaglyphs, polarised lenses or the 'wobble effect' even lcd shutter glasses.
If you mean creating a true three dimensional viewing experience within a computer game then there are ways.
Nvidia and some other manufacturers already sell quite expensive 3d glasses that link to their graphic cards so that you can experience 3d graphics 'in game'. This only works however with games created using the same technology.
'demons breath' is on the right track
There was an early piece of code to create a multiplayer using two cameras on screen at one time. Probably still in codebase.
You would need to create three cameras as in CINERAMA the idea being to create 20/20 vision
The left camera is set to look to the right
The centre camera looks dead ahead
The right camera looks to the left
The effect is similar to normal vision which includes peripheral
A slight blurred line always appears where the two side pictures fit alongside the centre one but as you would always normally be looking ahead this would not be that noticeable.
From my own experience the glasses used for all the different 3d versions just create headaches. The CINERAMA version which needs no glasses is best.
Get yourself a copy of 'How the west was won' in cinerama and you'll agree that the three cameras work.
Good Luck with your project
mpc