The DPI tag in the output file from ViewCaptureToFile is always 72 (except in V6 when it is always 144), independent of the the DPI setting used when capturing the file. I’m using Rhino for Windows. I know that the DPI tag is essentially arbitrary, but this has caused confusion for at least one user.
Example below.
This is the output jpg file. Discourse insists on displaying it as an image.


