Thank you for developing Quarto! I'm not sure which repo to post this issue in; I am posting it here as I'm working with Quarto in RStudio, but I apologize if it is the wrong repo.

According to [the Quarto website](https://quarto.org/docs/authoring/title-blocks.html#custom-backgrounds) we can set up a custom background for a title block banner by using the image path as an argument for `title-block-banner` in the header. Also according to [the website](https://quarto.org/docs/output-formats/html-basics.html#self-contained), we can use `self-contained: true` under `html` to create "a standalone HTML file with no external dependencies", "with images, CSS, etc. embedded into the HTML file". But when I create a supposedly self-contained HTML file with a banner image, I need to keep the HTML file in the root directory of the provided image path; otherwise, the image doesn't show. In other words, the document is not self-contained, inasmuch as it depends on the presence of the image file. 
2022-07-22T06:52:46Z
GilHenriques
Future
open
Self-contained HTML with block banner figure
https://github.com/quarto-dev/quarto-cli/issues/1496