I have tried
But this returns the error
ERROR: Package pdftex.def Error: File `http://www.website.com/path/to/figure.png' not found.
Are there other options?
you could use
note however, that recent versions of miktex and texlive come with restricted versions of \write18, and it some cases you must pass an option to latex to enable it, as in:
Short answer: no. You will need to download the image and use it locally if you want to include it in your document. pdfTeX and XeTeX do not include the necessary code to grab an image from an arbitrary location.
Of course, you can link to an image at at remote location. You can make use of the
or by downloading a local copy and then pointing to the online version
I note from the comments that LuaTeX does include the necessary library to download a copy of an image itself. That would make inclusion possible directly, but I don't know of a pre-build solution for LuaLaTeX. I guess that would be a separate answer in any case.