Add Emission

MDL Identifier: core_definitions::add_emission

Description: Adds emission to a material

Display Name	Type	Parameter	Default	Description
Base Material	material	base	diffuse()	The material that will get emission added
Color	color	tint	color(1.0)	The color of the light
Intensity	uniform float	intensity	1000.0	The brightness of the light source
Unit for emission	enum	unit	lumen_m2	The physical unit of Intensity