[REL] Unscratched Optics for 'Large Optics for TDW UI'

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Originally Posted by LesBaker

Is this what you mean with a ring of dirt around the optic !

That's not "a ring of dirt", but the gradual decrease of the light tramsmitted from a group of lenses, going from the center of the optic to the edges. In optics it is called vignetting. Normally this is barely noticeable, but all the original pictures of WWII scope views show this phenomenon to some degree.

Originally Posted by LesBaker

It doesn't look to bad in daylight but I think it will look terrible at night, this is how bad it is with the scope down.

IIRC other scope mods as well as stock periscope masks got this effect right. Try looking at them for some clues on how to achieve the same.