Translucent would be an idea. Some years ago I flew at a local comp with the late afternoon sun directly in the centerline. They had a semi perminent, solid sun disk... didn't enjoy the experience at all. If you lost the plane behind the disk, you naturally move to find it. BANG! Instant sun blind for the following seconds, had to have the caller inform me about the model... hated it. Having said that, a disk is certainly is something one can to get used to as the locals look it all in their stride, no problems at all. Least the disk gave me something to loop around. Different types of translucent disk are certainly worth experimenting with IMO.