The X
按字母分类：
extension name file type Classification
R3D RISA-3D Model File 3D image file
RAD VRAD Lights File 3D image file
RAD Radiance Scene File 3D image file
RAY Rayshade Image 3D image file
RCS RandomControl Scene File 3D image file
RDS Ray Dream Studio Scene File 3D image file
RFT Revit Family Template File 3D image file
RIG Antibody Model Rig File 3D image file