Descriptive Problem Summary: After updating to BYOND 5.12 every time I play on a Space Station 13 server blue and green squares take up a majority of the screen. I tried uninstalling and reinstalling BYOND to fix this but it did nothing.

Does the problem occur:
Every time? Or how often? Everytime
In other games? Only tried SS13 so far
In other user accounts? No idea.
On other computers? No idea.

When does the problem NOT occur? Never.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked? 5.11

Here is a screenshot
Moved to BYOND Help. There was a similar issue to this already reported, and it appears to be an issue with the rendering on certain machines. It's quite possible you got kicked out of hardware rendering mode and need to turn that back on.