how to create blur background ?? (important)

Graphics Shaders & Materials
1

hi there
i want to create a background like "limbo’ or “Toby : The Secret Mine”
i use 2 different shader (with and without shader forge ) but it run very very slow in my phone . limbo have very arts but run good !!
how i can create it ??

2

maybe background objects are already blurred images?
or using blur image effect to do that for one layer…

what does your blur shader code looks like?

3

From mere observation of the YouTube gameplay videos, Limbo mobile versions, like its desktop/console versions, use at least 2 layers of parallax background then apply depth of field image effect. Having pre-blurred images will not give you the same result.