Descriptive Problem Summary:
Using blur filter cuts off the edge of the filter too soon at larger sizes (4 - 6)

I use 6 as the upper limit on this, because the reference refers to it as the upper limit on cheat-free rendering, so I naturally expected a consistent result for values up to 6.

Numbered Steps to Reproduce Problem:
See test case

Code Snippet (if applicable) to Reproduce Problem:


Expected Results:
Things to look the same on the screen as they do in real life when I take off my glasses (plz dont call me 4 eyes)

Actual Results:
Things are blurry, until they're really blurry, and then the edges of the blur just stop. No more blur. just clean line.

Does the problem occur:
Every time? Or how often?
i
In other games?
love
In other user accounts?
you
On other computers?
mom

When does the problem NOT occur?
You tell me.

j/k. Smaller blur sizes.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked? (Visit http://www.byond.com/download/build to download old versions for testing.)

Workarounds:
Ignoring your problems (only a short term solution, not recommended)

Test Case
https://cdn.discordapp.com/attachments/725458744711839873/ 822563605282684939/test_case_src.zip