added zero padding for taylor series matlab precomputation
start developing adaptive taylor series based diffraction shader, tagged as experimental, which chooses adaptively k values, depening on (u,v) values. also, it will use pq correction and alos assume coherence of sunlight in order to determine the number of periods of patches along top lvl surface required for adequate rendering. later this version will also use bump mapping approach in order to deal modulation of macro surface, regarding patches.