.OL File Extension
Valve Hammer Object Layout File
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|Category||3D Image Files|
What is an OL file?
File created by Valve Hammer Editor, a mapping tool for the Goldsource engine that runs games like Half-Life and Counter-Strike; contains prefabs, or objects, and their .WAD texture files; referenced by Hammer to map out objects and textures.
NOTE: Hammer Editor is included in the Source game engine SDK.