static get type() {

		return 'ViewportTextureNode';

	}
A special type of texture node which represents the data of the current viewport
as a texture. The module extracts data from the current bound framebuffer with
a copy operation so no extra render pass is required to produce the texture data
(which is good for performance). `ViewportTextureNode` can be used as an input for a
variety of effects like refractive or transmissive materials.

@augments TextureNode