I have a problem with very obvious banding showing up when using a TIFF generated from an Digital Elevation Model in ArcGIS. The image you see uses an exported 24 bit TIFF. I think it could be solved if I can use an exported 32 bit grayscale TIFF from ArcGIS, but this won't load in Blender. I can also export the height data as an ASCII file, but see no way of using this, except by maybe writing a Python script.
I've read something about Blender being able to use OpenEXR, but I can't figure out how to convert my TIFF to this format. I'm on a Windows 7 machine. Can anyone help me, or know a way to solve this without converting to EXR?