All the nice pictures of nebulae that we usually see everywhere are of false "exagerated" colors, or true colors from a long exposition. A nebula seen with the naked eye through a good telescope is usually a gray blob with maybe some weak/dark colour tint. But what would see an hypothetical human observer, if he/she was standing right in the middle of the nebula ? Would the light seen with the naked eye be of stronger intensity/color ? To what point, compared to the usual over-exposed pictures ? I guess nobody actually knows the answer to this question (obviously !), but I'm still wondering what is the "expert" opinion on this.