We may not haev any idea what the orginal's look like. The examiner would have seen orginal's in microscope. Then a photo was taken apparently for example merely for demonsrating the evidence, I believe the Jury will have actual slides available if they desire. Further, assuming we are looking at photos these photos had to be scanned.
In order to say anything definitive about comparing them we have to state the light, background and distance etc was exactly the same AND we have to make the same claim about the scans so we can view them on computer. Plus if they are not direct scans of original photo we may be viewing a press photo of a photo.
But what do I know, I can't match my clothes.
You are correct. There was a great deal of microscopic examination of the orange fibers. The photos available to us on the internet mean nothing.