Just a moiré effect achieved from the intersection of two graphic grid expressions. A CRT monitor grid expression multiplied by a moiré grid lines.

Meant to have good control and easy animation based on camera movements. 


You can disable moiré grid if you need the CRT pattern only.



CTR pattern – Customize ctr pattern 

Moiré – Chose your animation and enjoy

Chroma – Add chromatic aberrations



from nukepedia