The materials posted @ Renderer for architectural visualization - Corona | Chaos for the Basic Set by Ludvík Koutný is missing texture files. Not sure if this is intentional but this images are not included with the downloadable .zip file.
Required asset file(s) could not be located:
ConcreteBare0145_2_S.jpg
ConcreteNew0024_2_S.jpg
Leather0065_3_S.jpg
MetalBare0018_S.jpg
PlasterWhite0083_2_S.jpg
WoodFine0007_S.jpg
WoodFine0055_S.jpg