In version 0.12 Windows API is not comaptible anymore without DX12 , it wants DX12 or else is not going to work .
You saw how Crysis made human models to look very good in DX10 and DX9 and it's not the only one , there are varies games that made human models to look good even in DX9 .
Version 0.11 was the last one to work for DX11 API , but it had lots of bugs in it .