How you choose to create your images is entirely up to you - if you feel it needs postwork or want to add it then do so. I think there is sometimes a kind of snobbery amongst some 'artists' about this, as thought the work is not valid if you've done some postwork!  What a load of bull I say. Don't be constrained by what others say you should do. Create the art you want. Of course there is something to be admired if a great image can be produced using only the program, in that there is some skill in getting lighting and textures right etc., but  I think in the end what you do to achieve that final work is irrelevant if you are happy with the result, whether it be oils,crayons,pencil,computer software, whatever. The only time it may matter is if you are entering a competition where it specifically states no postwork allowed.

Beginners tutorials for Bryce

Bryce Arena