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Modelling
From Quake Wiki
Revision as of 12:38, 25 March 2013 by 78.37.177.78 (talk)
To keep it short: Make models in w/e 3d modeling software, like Blender, 3ds MAX etc. Export to FBX (it supports animations).
Then use Noesis to convert to MDL or other format supported by quake engines, like IQM