Webp image format

I’ve run into something similar before. A couple of quick things you could try:

1. Storyline doesn’t natively support .webp yet, so it will always convert to PNG/JPG on publish. Best to pre-convert your images to PNG/JPG before bringing them in.

2. Try bringing in larger resolution images than you think you’ll need—Storyline will scale them down on screen, but if learners resize the browser, they’ll still look sharper.

these basics usually keep images from looking blurry after publish.