*.ogf

About

Compiled 3D models for the game

Storage of meshes without skeleton and with skeleton is supported
Only one skeleton
Number of bones from 1 and not more than 64
Bones have game parameters and collision shapes
Models with skeleton can have animations or references to external *.omf files with animations (Motion References)
The number of bones that can influence a vertex can be within these limits: SoC format - 1, 2, CS/CoP - 1, 2, 3, 4 (when exporting the extra ones are discarded and only those weights that have the biggest influence are stored)
A file can store many materials
- A material can have only one texture
The number of vertices on which the triangles of one partitioned mesh are built (see previous point) cannot be more than 65,536 (since vertex numbers are stored in 2 bytes). In practice, when creating objects in blender, you should make sure that the number of triangles of one material is not greater than 65,536
Smoothing is stored as vertex normals. Due to this, during export to *.ogf, not only the boundaries of smoothing groups, but also the direction of normals are stored
A mesh can have only one UV map
Support for storing information about geometry simplification in the form of Slide Window Items

Blender X-Ray is an addon for the Blender that is designed to import/export 3D models and animations from S.T.A.L.K.E.R. (X-Ray Engine).

SDK or Software Development Kit helped the developers of the original trilogy and the modders to develop the game itself.

Tool for fast editing and exporting raw S.T.A.L.K.E.R. formats.

Tool for working with *.ogf and *.dm format.