Very Tiny reflexion Guillochage effect

[fraggle]

Hello,
If there is somebody on the jewelry CG field, I will be glad to get some advice to render "Guillochage" finish.
I tried to add some sidelighting almost at object level to increase the effect, catch more reflection and more bump (to reveled more the pattern ) but with no luck.


I do increase the resolution to 4k using BF only, pushing the AA quality to 100%, shading quality to 100% and CG qality to 100% but the result is very disappointing. Turning ON the Fresnel make the pattern less visibles but I gain a little in reflection. Turning down the Map Blur doesn't improve it neither.
So I guess it has something to do with the shader and not with the rendering preset.


Thanks for your advice.

[Morne]

Without checking out your scene, you could try making the shadow bias smaller for that light you added from the side. Try "0" and see if that does anything

[fraggle]

guillochage.zip
Thanks Morne,
Could it be an issue with the quality of the map?
Per experience, when I look at a piece of metal with a guillochage, without special lighting, I can clearly see the pattern jumping out from the reflection.
In a studio setup (like in vray) is should be a lot easier to reveal the pattern than in a day light condition.

Thanks.

[Mokiki]

Maybe it's just because I am not really familiar with the name or effect but when I take your scene and just make it a plain generic metal and leave the bump maps with 0.01 filtering I get a pretty strong pattern effect. Though I am pretty sure I am misunderstanding what you are after.

*edit* added another render with your blueish reflection color.

[fraggle]

Thanks, for sure a plain reflective material is a good shortcut.
My goal is to achieved the subtle details, to make it look like a Guilloche.
Here are other sample where we can understand better the look of guilloche.
http://www.ablogtowatch.com/wp-conte...-blue-moon.jpg
http://storage.googleapis.com/pubzap...ge.2156623.jpg
Looking at the Breguet Watch, maybe an occlusion may add more realism by increasing the groove.


Thanks anyway for your test.