Ideally for both 7" (Single) and 12" (LP) types.

I thought about scanning the damn things but that gives somewhat unsatisfactory results, even with the cleanest scanner glass and a near as dammit pristine record. Different colour vinyl doesn't seem to help, either.

The best I came up with so far is a series of thin, narrowly spaced concentric circles but the detail geek in me ain't satisfied with this.

Even a rudimentary spiral is a major pain in the rear end, it seems, so if anyone found a way to do it without causing endless pain, suffering, outbreaks of bad language and whatnot will have my gratitude.

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I assume that you will be creating a bump mappings for the vinyl discs? Considering how many circles it will take to create a decent disc, you may need to consider an image. If you have photoshop or GIMP, there may be a template available you can work with.

how about using a high rez tiff file for bump instead of modeling in all that detail?

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Have you considered applying a free hi-res image to a plain disk ?? Use grey-scaled image as a bump/displacement map ??

I reckon many CAD packages could craft a disk with actual groove, per 'turning thread on a bolt', but result would be very, very high-poly, akin to a complex terrain model...

How close do you intend to get to the vinyl to render? You may get away with a spec map that suggests the grooves instead of trying to create a bump map.

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.

If you can tolerate concentric, there's a record in my Broadcasting set with a fairly fine set of concentric circles plus spiral leadin and leadout. It's a bump map.

https://sharecg.com/v/88375/gallery/11/Poser/KDV-a-1930s-radio-station

You have permission to use the record or the map.

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Thanks, all.

I really haven't considered modelling the detail in. Oh, not ever. I'm not daft, yer know. I've always wanted it to be a texture file and so far, I've been using a high res PNG, which is OK but I'd love something a bit more... spiraly.

@ockham: Many thanks. I'll take a look at it and may borrow some of it for my own use. If I ever release anything (doubtful, at least in the immediate future) I'll make sure you get the credit.

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Don't worry, I owe you some 'value' after using your Daleks often!

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adp001 posted at 7:00AM Fri, 11 September 2020 - #4399176

Would that work in Firefly? I don't use Superfly.

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It won't work in Firefly, Sam. It's a cycles material.

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.

Well, that's a bit of an embuggerance. :(

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It's the same as this for Firefly. I didn't faff with the spec or bump settings or even render it to see but it's essentially the same mat...

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Cheers, mate! I'll give it a go.

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It works. But different.

This may be a start to experiment. And set the bump intensity mutch lower. For me it is 0.02.

Anisotropic depends hardly on light. And needs high render values.

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Oh yes. The bump value in my screen shot is absurdly high. Funny because my go to default value for bump testing is 0.02 as you show (inches)

Also yes. Anisotropic is a very strong specular, probably why so many in the past have used it for specular on transparent materials like cornea and such.

Anyway...

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About anisotropic lighting in renders:

https://www.opengl.org/archives/resources/code/samples/sig99/advanced99/notes/node154.html

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It's something I have in the works, but I expected to have to get into before long. I planned to go with either a normal map or bump myself.