**altmandee......

For larger png renders, you need to go into your Render Options and change them. Bring your character as close to the "window" as you can using the camera without taking anything outside of the frame. Then go to your Render Options and change the size of your render to the size you want. I set mine anywhere from 1100 X 900 up to 2000 X2000. I go the larger size so as to work with it in postwork better. Be sure to click off "constrain" or it won't do exactly as you want.

As for the character with the white complextion that's still flesh tone...I'm afraid you would have to contact the vendor about it.  I don't know which ones you are referring to and only the vendor can best answer any questions about their product.**