Those are computer generated/Done in Paint shop,Corel,or other mediums, Yes it requires a tremendous amount of hours,and it has it's place in today's society,Back in the 70's& 80's Art was Art,Created by the talent of many individuals, until Copying became affordable & popular,never the less Art will always be art. how good the artist appeals to the plublicmakes the difference, take for example Terry Redding,his art portray'scabins in the woods with varoius compositions, That is what the plublic expects of him ,lots of artists are miserable with this,but! that is what sells, Thats their trademark!
RADAR