I love both Castle Volkihar Rebuilt and Wintersun. But I always found the bloody shine of Molag Bal added by Wintersun in the main hall out of place one the Dawnguard take over the castle. With this mod installed the Shine of Molag Bal added by Wintersun will now be disabled once you get to a certain stage of rebuilding the castle.
You may do whatever you like with this mod but be sure to follow the original two mods premissions.
File credits
EnaiSiaion and Arthmoor for the original mods this is a patch for.
Donation Points system
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If you side with the Dawnguard the Shine to Molag Bal and its accompanying blood stains on the floor. Will be disabled once you get to a certain stage of rebuilding the castle.