I've done a scene and registered the picture in TIFF 32 bits.
Open it with Affinity Photo (but with Photoshop, the result is the same), the picture is washed.
Same scene, registered in TIFF 8 bits, result is ok.
In c4d viewer, images in 8 bits or 32 bits are the same (it's normal, all rendered images are in 32 bits) but if I register my image by the picture viewer, the image in 32 bits is ok in Affinity Photo.