I have a hard time figuring out if it is possible for a user to generate on the fly (via a javascript/openlayers app) a WPS request to geoserver and that the output is rendered as a WMS image? So lets say the user selects 2 raster layers, a WPS request is POSTed to perform a specific transformation of the data, and then the output of this transformation is rendered back to the user's app via a WMS image. Thanks for your help, I have a hard time finding any info on that regard!