
how did you generate the grain noise svg? https://staging.cohostcdn.org/attachment/78599a97-fc80-468b-8a34-3aed3a98ffc7/grain.svg
You can open it in a text editor to see it using the built-in turbulence filter:
<svg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'>
<filter id='noiseFilter'>
<feTurbulence type='fractalNoise' baseFrequency='0.45' numOctaves='2' seed='2' stitchTiles='stitch' />
</filter>
<rect width='100%' height='100%' filter='url(#noiseFilter)' />
</svg>
I just tweaked the parameters until it looked right.
wow these IEE projector displays had a lot of applications