Viewing 3D Views in Anaglyph mode in gvSIG is one of the (multiple) new features that the user will find in gvSIG Desktop 2.3.
Anaglyph are images in two dimensions that can cause a three-dimensional effect when they are seen with special lenses (different colour lenses for each eye). Anaglyph images are composed of colour layers, overlapped but one of them is slightly moved respect the other one to produce the depth effect. When it is seen through anaglyph glasses, a three-dimensional image is seen. The visual cortex of the brain fuses this in a scene with depth.
In gvSIG 2.3, this visualization mode can be defined at the 3D tab of the View properties.
The effect of this application can be watched in this video: