I don't know if this has already been fixed or if it's OptiFine's fault but whenever I look at the sun now it gets covered up by a dark grey semicircle. The attached screenshot depicts the glitch in action. It also seems to affect stars and the moon.
MC-145423
The sun, moon and stars are covered by a grey circle when looking at it
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Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
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