Remove alpha option, or repurpose it as a "strength" on #saturate pattern

Server Implementation

Paper

Server Version

1.20.1

Describe the bug

Due to a player request, @TheMeinerLP and I investigated how #saturate works and found out that the alpha (which is the tranparency) always has to be 255 in order to work.

To Reproduce

1. Do //re #saturate[0][255][0][1] and set the 1 to a number that is not 255 and below
2. See after a minute that it won't work

Expected behaviour

It should work and the transparency should be applied -> glass might be set then or something more transparent

Screenshots / Videos

No response

Error log (if applicable)

None

Fawe Debugpaste

https://athion.net/ISPaster/paste/view/4a7ba67d0e8347b9ae6d553dd08ff988

Fawe Version

Is not important here, see info below (we had several tests running at this version and latest 2.7.2)

Checklist

• I have included a Fawe debugpaste.
• I am using the newest build from https://ci.athion.net/job/FastAsyncWorldEdit/ and the issue still persists.

Anything else?

This issue is since 2021 in the code at this place:
https://pastebin.com/HK9giLqt

Start by reproducing the issue with //re #saturate[0][255][0][1], then review the saturate implementation described in the linked Pastebin. Determine whether alpha should be removed or repurposed as strength, and verify the chosen behavior by confirming that values below 255 work as intended.