I've once done some testing with 3D-apps and red/green 3D-effects. Unfortunately I haven't got a clue how to create fullcoloured images but the basic idea is that two images, representing the same scene from shlightly different angles, are combined in a way that one can't be seen when viewed through a red lens and the other through a green lens. In Carrara I'd create a group of two adjacent cameras, that can be moved closer and farther away from each other, and a target helper object.These three are parented by another helper object that is located between the cameras and is also set to point at the target helper object.This way it should be easiest to control the placement of the cameras and their target. I suppose that to get the best result the cameras should be equally far from the parenting helper object between them. The further the cameras are from from each other the stronger the 3D-effect is. In some point however the effect gets too strong and it is lost. This point varies a little to the viewer though. Another way to control the strength of the effect is to move the target point further away and closer to the cameras. I presume that the best result can be obtained by setting the target point a little closer than the furthest visible point on an object in the scene but I'd recommend that you test with this rather than take it for granted. The closer the point is to the cameras the more eyes cross along distance beyond the target point. Propably setting the target point further than anything else in the scene would be a logical choise but it might enhance the effect if you brought it a bit closer than that. This way to closest point in the scene don't have to be quit so far from each other in different images. Please, inform me on this one if someone tests it. I did the combining of the images in Photoshop. One B&W-image was coloured red and the other green. Then the different layers were treated so that one looked black when viewed through the red lens and the other through the green lens which of course depends also on the tones of the red and green. Finally the top layer was set to blend the lower level so that they were both visible. I cannot remember the correct blend mode nor if I did reduce both layers' opacity. I think the blend mode was either multiply or screen but I'm not sure on this one either. -HK