This is a sample image saved from SketchUp demonstrating shading, transparency, materials, etc.
This is the same model run through the IRender renderer demonstrating lights, multiple shadows, reflection, Antialiasing, and soft shadows.

Photorealistic refers to creating images which resemble a photograph.


SketchUp and OpenGL

SketchUp uses an OpenGL renderer to achieve several photorealistic effects:

PhotoRealistic Renderings

High-end Photorealistic Renderers attempt to be more like a photograph by adding:

See Also

SketchUp Plugins for Photorealism