Well i'm still shaky with kimera but but, if it's the field model, open kimera, click open model, and where ever you have the files for the field model navigate their and open aaaa.hrc and you shouls see a cloud model visible in kimera, click the head and on your right hand side, click add part to bone and look for the file named rtao and then save the model, do not compile multiple p bones in a single file( you can try it but it crashes for me), this is where i'm stuck though, when i save the model and export it, it appears untextured in the game i don't know if it will be the same with you so try it first.