One should use the default material model for creating materials for conversion. In these cases parameters and parameter categories are used that are not known by the converter, so these settings are ignored, and if there is not any parameter among the material’s settings that could be converted, the whole material conversion is skipped, and no material is assigned to the converted object in Archicad.

Beside the default material model structure there is the possibility in CINEMA 4D to create materials based on different lighting model.While in CINEMA 4D textures can be applied to many kinds of settings (like luminance, transparency), Archicad use textures only for determining object colors, so even the bitmap textures are ignored during the conversion when applied to non color material properties. The only textures one can convert are the bitmaps loaded from image files (jpg/png/bmp). These cannot be converted, while these algorithms are not implemented in Archicad. CINEMA 4D also offers textures that are based on singular algorithms that are computed during rendering.Some of these parameters have according material settings with exactly the same functionality in Archicad, some others can be converted, but there are some that cannot be interpreted by the rendering engine of Archicad, these are simply ignored. There are a large number of parameters for setting the materials’ visual behavior when affected by direct or indirect light or like glowing, transparency, etc. CINEMA 4D offers much more material setting possibilities than Archicad does.During the import process only the material and geometry data is being converted.Limitations at importing CINEMA 4D models into Archicad by loading, merging c4d type files and by freeform modeling:

Cinema 4d software