I am working on an InDesign print document A that includes an image tilted 18 degrees with a slight drop shadow. All four sides of the image show and it is overlaid on a solid color. The image is actually another InDesign document B which has the appearance of a form with a white background but includes PDF, type and image material. So far, so good. However, I want the lower right corner of the placed InDesign document B to include a page curl. The back of the curled page should be white (with appropriate shading). I will have occasion to make changes to this document B which is part of the reason it is a placed document.
What is the best way to make the page curl feature?
If you just want a static graphic that looks like the upturned corner of a page, you can create it with the shape and gradient tools in InDesign: