Corner window smoothing doesn't work correctly

[out-of-phaze]

Description of issue

There are artifacts on corner windows sometimes.

Difference between expected and actual behavior

Those artifacts shouldn't be there.

Steps to reproduce

Look at windows in a similar position as the one with the artifact?

Specific information for locating

See image above.

Length of time in which bug has been known to occur

I have no clue.

Client version, Server revision & Game ID

Client Version: 514 Server Revision: 248fa89dcf30f00b56e5129b07765bfc5442e5fd - feature/shiptesting - Game ID: cl0-dhbK Current map: the Frontier

Issue bingo

• [x] Issue could be reproduced at least once
• [x] Issue could be reproduced by different players
• [x] Issue could be reproduced in multiple rounds
• [x] Issue happened in a recent (less than 7 days ago) round
• [x] Couldn't find an existing issue about this

[out-of-phaze]

Another one.

[MistakeNot4892]

Verified this occurs on Bay so likely a core issue with smoothing logic.