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.
#Maxon cinema 4d r20 system requirements windows
Go to the Windows “Control Panel” and select “Programs and Features” to remove all Cinema 4D Add-On components from your computer.