Ch. 13- normal model image from the web

[VectorPosse]

The link to the image of the normal model from the web is a valid link, but for some reason, it's doesn't seem to appear in the rendered document. (It does appear correctly in the book build on the website.)

[VectorPosse]

It appears this may be a Wikipedia limitation (robot policy for fetching content). Not sure why it works when building the book vs rendering, but I may need to find another way to embed this image.