So we’ve been having this inverted color issue when using UnmanagedGeoTiffRasterLayer for tiff files that won’t show up with the regular GeoTiffRasterLayer already for some time. We now noticed the same behavior also when using UnmanagedProjectionConverter for a GeoPDF on a GeoPdfFeatureLayer when the regular ProjectionConverter just wouldn’t render.
I’ll send the PDF in question to the support email for you.
I believe the problem has something to do with the color representation being in different byte order than expected by the Unmanaged components. Could you by any chance fix this internally because I don’t know what really could be done outside ThinkGeo libraries?