Modding ADA's normal head and keeping original Achead in CG

This time I try keeping the original texture and Achead for CG.I add the head's part of new model texture in ADA head's texture and change the new mod's UV in 3DS MAX.Then I advoid the bug between Achead and normal head's texture successfully
And, because of some problem about the OBS which is the software I use to make this video,the video is not as good as I hope. Excuse me