Go to [Filter -> Noise – Add Noise].
Please match my settings.
Let’s add a Gaussian Blur. (Filter -> Blur -> Gaussian Blur).
Go to [Image -> Adjustments -> Levels].
Create a new layer and paint the layer with blue and purple colors by using a brush with 10% opacity.
Create a new layer, fill it with black, and go to [Filter -> Render -> Different Clouds].
Change the different clouds layer’s blend mode to Color Dodge.
This is the end of the tutorial. 🙂