TechneModel tm = (TechneModel)AdvancedModelLoader.loadModel(new ResourceLocation(modId.toLowerCase(), "models/modelname.tcn"));
Map<String, GroupObject> model = ModelObj.bakeModel(ttm, 1f/16, new Matrix4f().scale(new Vector3f(-1, -1, 1));

...

call something like Util.renderWithIcon from https://gist.github.com/RainWarrior/9573985