0389704 20240103202237.020130312235959.9 9 s. E cav_un_epca*03897031081-1451112 (2012)15-23 realistic material rendering bidirectional texture function Blender cav_un_auth*0237115 Hatka Martin Rozpoznávání obrazu Department of Pattern Recognition RO RO UTIA-B Ústav teorie informace a automatizace AV ČR, v. v. i. cav_un_auth*0101093 Haindl Michal Rozpoznávání obrazu Department of Pattern Recognition RO RO UTIA-B Department of Pattern Recognition Ústav teorie informace a automatizace AV ČR, v. v. i. http://library.utia.cas.cz/separaty/2013/RO/haindl-advanced material rendering in blender.pdf 387/2010 CESNET CZ 409/2011 CESNET CZ GAP103/11/0335 GA ČR cav_un_auth*0273627 GA102/08/0593 GA ČR cav_un_auth*0239567 Physically correct and realistic visual appearance rendering or analysis of material surface visual properties require complex descriptive models capable of modelling material dependence on variable illumination and viewing conditions. The recent most advanced representation of visual properties of surface materials is a Bidirectional texture function (BTF). BTF is 7D function of planar coordinates, spectral coordinate, and viewing and illumination angles, respectively. Unlike smooth textures, it specifies their altering appearance due to varying illumination and viewing conditions. This BTF visual appearance dependency on viewing and illumination conditions significantly complicates not only its acquisition, representation, and modelling but also makes its rendering noticeably more demanding. BTF textures are acquired by costly measurements of real materials and their subsequent nontrivial processing. 2013 BD 2 RVO:67985556 http://hdl.handle.net/11104/0219529 2012 cav_un_epca*0389703 The International Journal of Virtual Reality 1081-1451 Roč. 11 č. 2 2012 15 23