Fire

this may sound dumb but how do you make fire ?

Visual aspect ?

The book of Will Goldstone (Unity Game Development Essentials) teach to use two particles emitters, one emitting fire images, the other emitting smoke…

i want to make a camp fire

See AkilaeTribe’s reply. (As he alluded to, a typical solution would be to use particle emitters.)

You might want to look at ikke998’s campfire particle system in this thread.