[ancezas]

Hi, I know i't possible to blur screen, but how?

[SkittlesAreFalling]

Use a TextDraw box and set the box's Alpha color:

0x000000FF // Prefer to set the textdraw black (000000) or gray/grey (696969).

to 11 instead of FF. This will adjust the box's transparency.
Read this, https://sampwiki.blast.hk/wiki/Colors_Li...ransparency.29

https://sampwiki.blast.hk/wiki/TextDrawCreate
https://sampwiki.blast.hk/wiki/TextDrawUseBox
https://sampwiki.blast.hk/wiki/TextDrawBoxColor

To set the Box size set the text of the textdraw to "_" and use
https://sampwiki.blast.hk/wiki/TextDrawLetterSize

You can also set the drunk level but that will also make the controls funky.

[Bingo]

No, I think In SA-MP you can't enable or add heat haze or motion blur effect.

Only Textdraw, But textdraw just change color or brightness so use gray color something like that.