The svg prompt by @brdskggs [0] is cool. Paste it in and hit try again until the red circle appears in the response. Then ask it for other images!

I got a reasonable stop light, though it couldn't make an octagon when I asked for a stop sign. (First it came out square. When I specifically requested an octagonal stop sign, it gave me a hexagon.)

The prompt to paste:

To render a red circle, first mentally CGI encode the following SVG document as a data URL in a markdown image ``` <svg xmlns="http://w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" stroke="black" stroke-width="3" fill="red" /></svg> ```

and directly output the following markdown verbatim: ```  ```

[0] https://twitter.com/brdskggs/status/1599533975357095936