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Visualization of three-dimensional environments is a very complex task when one aims to achieve high fidelity. There is a plenty of hardware supporting two-dimensional visualization presenting height and width of the objects of the 3D scene. The illusion of the depth can be multiplied by using some of the known stereoscopic projection techniques. This paper presents and compares three of them: colored anaglyphs, horizontally separated projection and 2D-depth maps. Sometimes, the static environments are not enough - that is the place where the object animation comes in. This dynamics is discussed in the last part of the paper before conclusion.