Fill Image (Base64)

A Base64-encoded alternative to fill-image for supplying a custom background image when fit=fill or fit=fillmax is used with fill=image.

fill-image64 accepts a Base64-encoded absolute URL. It behaves identically to fill-image — the decoded URL is fetched, cover-scaled to fill the canvas, and optionally dimmed with fill-darken. Use this form when the image URL contains characters that would be ambiguous or unsafe in a query string.

If both fill-image and fill-image64 are present, fill-image64 takes precedence.

fill-image64 only takes effect with fill=image. It is ignored for other fill values and other fit modes.