Excellent detail.

Very nice. How did you generate the model, depth-map and Blender?

Excellent

In case anyone is interested, I purchased the 1/4 wave retarders here.

https://www.apioptics.com/

-JW:

Excellent. I would love to have a slide of these.

Very nice.

Straight from the catalog.

https://www.manualslib.com/manual/11453 ... e=6#manual

-JW:

... source found.

Do you need precisely 60mm or at least 60mm? A cheap source would be a 62mm circular polariser with the linear filter removed. I'm out of my league here, filter-wise. I think something between 60 and 55mm would work, but not sure. I'm willing to try of course. I can redesign my rotating slider to a...

Looking for an inexpensive source for (3) 60mm (actual filter diameter) 1/4 wave filters. I tried some Edmund Optics 1/4 film, but it's a bit too 'thin' for my intended purpose.

Sure makes things more enjoyable when things get setup correctly.

Excellent and a superb job coloring.

Excellent

I used Chem Sharp a few times but there are other ways to sharpen including electrolysis. Grinding won't get you fine enough.

https://cshprotocols.cshlp.org/content/ ... 9468.short

https://www.youtube.com/watch?v=WvepYAwiKU8

-JW:

I've never tried what you're asking about, so this may be a moot response. Perhaps a pulled glass needle or a sharpened 0.25mm tungsten wire would work. A couple of photos of tungsten wire.

-JW: