First try:
FYI we have an omnibus test thread over here:
This other thread offers specific advice for image posting from various sources. But the details tend to change over time as the hosting websites make changes to their web app.
The process here at the Discourse end is unchanging; the hard part, especially on a phone, is correctly capturing the url that points to the image itself, not to a page that holds the image.
Thanks! I’ll keep that in mind if I have trouble in the future.
You have to upload your image to a “hosting website”, as you put it, not to The Straight Dope Message Board itself, because the admins instructed us not to, so I would be an asshole if I went and did it anyway, unless that policy has changed.
An image URL will end in an image-type extension: .png, .jpg, .webp, etc.
TPTB’s intent all along was to configure Discourse to disallow image uploads. That got overlooked in the initial confusion of the switch from vBulletin, and it was technologically possible to upload images here for a few days after the cutover. But that oversight was corrected 6+ years ago.
You (any you) can’t upload an image to SDMB Discourse even if you tried. The server won’t let you.
There are still ways to do it, at least for small images. I’ve done it accidentally (and then immediately fixed it). I don’t think it’d work for a photo of normal resolution, though.