The quality of the blur effect.
This can be:
0 for Low Quality 1 for Medium Quality 2 for High Quality
The higher the quality, the more complex shader is used
and the more processing time is spent on the GPU calculating
the final blur. This value is used in conjunction with the
steps value, as one has a direct impact on the other.
Keep this value as low as you can, while still achieving the desired effect you need for your game.