function getPassThroughVertexShader() {

			return	'void main()	{\n' +
					'\n' +
					'	gl_Position = vec4( position, 1.0 );\n' +
					'\n' +
					'}\n';

		}
Renders the given material into the given render target
with a full-screen pass.

@param {Material} material - The material.
@param {WebGLRenderTarget} output - The output.