The X
按字母分类：
extension name file type Classification
X DirectX Model File 3D image file
X3D Xara3D Project 3D image file
X3G 3D Print File 3D image file
XAF 3ds Max XML Animation File 3D image file
XAF Cal3D XML Animation File 3D image file
XMF Cal3D XML Mesh File 3D image file
XMM 3ds Max XML Animation Map File 3D image file
XOF Reality Lab 3D Image File 3D image file
XPR Pro/ENGINEER Part Instance Accelerator File 3D image file
XRF Cal3D XML Materials File 3D image file
XSF Cal3D XML Skeleton File 3D image file
XSI Softimage XSI 3D Image 3D image file
XV0 Lattice XVL Structure File 3D image file