Is there a painting technique that i can learn that makes the paint kind of rise off the canvas?

i don't know if im asking this right but a guy i know asked me to paint an abstract paint (never done before by me) on canvas but he wants it in oils that are kind of rising off the painting not flat like i normally paint? if that makes sense can someone help and include any other tips u may have? thank u plus i have seen painting do it like in a museum just i usually see just prints or things like that normally around me.