In 3D computer graphics, Potentially Visible Sets are used to accelerate the rendering of 3D environments.
The focus on conservative algorithm research is maximizing occluder fusion in order to reduce this overestimation.
The list of publications on this type of algorithm is extensive – good surveys on this topic include Cohen-Or et al.[2] and Durand.
They are, however, complex to implement and typically run a lot slower than other PVS based visibility algorithms.
To tackle this, solutions are often performed using Plücker coordinates, which effectively linearize the problem in a 5D projective space.