Hi!
The full asset pack for modding has been released. The pack contains practically all scripts, textures, models and animation files of the game. Sound files are not included because their licensing terms don't allow redistributing them.
Please read the licensing terms first:
http://www.grimrock.net/modding/modding ... age-terms/
Download the asset pack here:
http://grimrock.net/extras/grimrock2_asset_pack_2.zip
The custom file formats are explained here:
http://www.grimrock.net/modding/model-a ... e-formats/
Happy modding!