Parallax banner image size in Basil template 7.1

Please advise: I cannot share the site due to it being a re-build in a new template within my existing live site.

I am trying to target the parallax banner images in the Basil template -- it seems that it is somehow 'zooming' in on the images I upload and causing them to display at sizes far bigger than the image is, which is causing pixelation, image going off the edge of the page, etc. I can't seem to figure out how to target the image and perhaps force the max-width on it or something to avoid this. I have already experimented with uploading different sizes of images, etc. and still looks bad. See screenshots for how the image looks currently, the SS ids, what the image actually looks like and html code... thanks in advance for any advice!

3 hours ago, Ziggy said:

When enabling parallax, the image needs to be ~20% taller than the space it is filling so that it can move in the background

Thanks Ziggy, I understand that and that may solve for this image -- I'll give it a shot. Would still love to know how to target those images specifically so I can experiment with adjustments via CSS, any idea what they're called here? Can't seem to target them with any code.

I would need to inspect your website to give you those selectors (I did read above that you may not be able to do this yet). What are you hoping to change?