Hello from Melbourne, Australia - that’s a lovely looking image by itself - very painterly…
Aside from adjusting controls in VDMX -
there’s probably a lot to be gained in adjusting your camera and lighting set-up…
What camera and lenses are you using? If you can use a lense that is f2, f1.8 or lower, that’ll help avoid noise issues… Placing a light behind you - as well as in front, can also help with separation…