This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Shading.svg Inkscape Image taken from en Image Shading model rendered in SketchUp by Al Hart del cur September Al Hart Talk contribs bytes model rendered in SketchUp by Al Hart talk Vectorized Me Shading model rendered in SketchUp by Al Hart Original history del cur September Al Hart Talk contribs Uploaded with derivativeFX