What two methods atmospheric used in apps perception to achieve a sense of special depth

Anyone have a site they can give me so i can get some drawings tutorials?

Define function. define form. how do the two relate to one another?

In areas where even the experts disagree; everyone has a right to his own opinion. i mean if answers aren’t given just like in lots of things; then it has to be just anyone’s opinion. is this dualism multiplicity relativism or commitment