5d6ec23e3e
Now it is forumlated in terms of deltas, and consists of the following steps: - Original displacement at the reshape level are being backed up. - New displacement is being written by the reshape routines. - Delta of the displacement is calculated. - Deltas are propagated to the higher levels, which also includes their interpolation/ - Original displacement is restored. - New interpolated displacements are added to the original ones. This is a base ground for the upcoming change related on using Catmull-Clark smoothing for the deltas instead of linear interpolation. Currently is no changes for artists, just preparing for upcoming work.