Generates embed code for displaying a 2:1 panorama image with Pannellum. The title and link for each artwork are always shown in white text below it.
The yaw / pitch here is "where the text label is displayed" (not the position of the artwork itself). For left and right, the default is set to the margin of the wall toward the center; for center, it's set toward the wall/floor below the artwork, with enough margin to avoid overlapping the artwork even when enlarged. Adjust here if you use a different background.