Page 169 in the PDF manual has a list of formats which support reading of tiles. According to that, OpenEXR does, and having worked with the API I shouldn’t think it would be a problem.
In order to deliver a personalized, responsive service and to improve the site, we remember and store information about how you use it. This is done using simple text files called cookies which sit on your computer. These cookies are completely safe and secure and will never contain any sensitive information. They are used only by fxguide or the trusted partners we work with.OK