.raw file
From COLLADA
In COLLADA, a .raw file contains COLLADA <float_array> and <int_array> element data in binary form. The idea is to make loading and saving of COLLADA documents faster by storing geometric data in binary instead of plain text. Raw files represent a nonstandard extension to COLLADA. They are supported by the COLLADA DOM, but at present no DCC tools or other COLLADA applications support them.
