This information applies to versions 6 and newer
DxO PhotoLab 6 ELITE edition and newer includes perspective tools previously available only by the purchase of DxO ViewPoint: Force parallel, Rectangle, and 8-point perspective tools.
DxO ViewPoint 4 is still required for ReShape tool, mirror image, volume deformation, and Miniature effect, as well as to access the standalone application and for users of DxO PhotoLab 6 ESSENTIAL edition and newer.