So I'm making a mod for a car Its interrnal name is "hi" (it's supposed to be short for something but I won't reveal what) and here is my flexbody code: "flexbodies": [ ["mesh", "[group]:", "nonFlexMaterials"], ["hi_body1", ["hi_body1"]], //["hi_enginebaycrap", ["hi_body1"]], ], For some reason, it does not work. The part's name in this .jbeam is "hi_body1" as is its mesh's name in Blender. I put the 2 slashes by the engine bay stuff because I thought earlier that was the issue. But even though this looks just like in covet_body.jbeam and just like in the documentation, it doesn't work. There isn't even an error in the log. So I'm not sure what I did wrong, if anything. --- Post updated --- Can’t check at the moment, but there’s a chance it doesn’t work because I did: „flexbodies”: [ instead of „flexbodies” :[ --- Post updated --- Update: That was not the problem. Something else is wrong. --- Post updated --- Nevermind I’m just dumb. Looked at a tutorial --- Post updated --- For those interested (Absolutely nobody) I didn’t know you had node groups assigned at the nodes section and only copied the flexbody code from the Covet.