Hi everyone. I want to make snake skin on a ring. At the first, I use ApplyDisplacement command and use an alpha image to create skin texture. but there is a problem…
After making skin texture, my texture needs to be smoothed:
What should I do?
@Meysam_Ebrahimi I use the heightfield command for this type of thing. As an example for something much more detailed like a finger print I use the following settings.
height .35
sample 200
interpolate
From my experience the results are usually only as good as the image you start from so some photoshop skills are really useful.
This finger print is about 10mm wide on the ring. Details translate to metal very well from Rhino to print and direct cast resin. HTH
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Does this have anything to do with the resolution of the alpha image?
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Hello @Meysam_Ebrahimi
in the case the displacement map doesnt work I have some skales lying around here. A few weeks ago I was doodling on different surfaces and so I created these fish scales.
You can use them if you like or use them as a suggestion.
Regards Jay
SchuppenRund2.3dm (4.7 MB)
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Hello! If I use “Heightfield from Image” - result not very much - edges uneven.
How can it be corrected? Why so it turns out?
There is a card: http://i89.fastpic.ru/big/2017/1025/8c/e2a3025d621ee24a6a55c99c235ed48c.jpg
If you use your card - the result is still bad:
Hi Modeler - set the resolution of the heightfiled to match the image resolution (726 X 390) and see how that looks.
-Pascal
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@Modeler3D this is what I get using @pascal image with heightfield.
Hi Sochin - you should probably do this without the setting to color the output with the image - it probably tricks the eye a bit.
-Pascal
Sorry @pascal, I had never tried that option before so thought I would give it a go while I was there. Here is a close up of the edge without the image.
Better but still not super smooth. Probably would not worry me given that detail would probably smooth out for me during printing at the scale we have in jewellery.
If I need a super smooth larger pattern for jewellery then I usually change from heightfield to repeating a t-spline object. Avoids any filleting issues. More work to set up but saves pain later down the production line.
It has turned out to make normally!
I have made the new image and have specified these settings:
Result:
The only thing that isn’t pleasant to me - strange defects on a surface…
@Modeler3D that is starting to look better. Because I use this process for detail that is usually fractions of a millimetre and more detailed I don`t worry about defects like you have there generally. That said I do not know why that has occurred but someone else might be able to tell you what is going on.
Why?
LOL the reason why I do not know why that has occurred is …I do not know 
I have never sought an answer because it has never been a problem for me. Someone else might have an idea and answer soon.
I use hightfield for very busy forms. If I want a simple clean shape (like the one in your photo) then I either model it in Rhino or T-splines.
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Thanks dear @sochin. I must use photoshop fot design this pattern. good to know. I will do it.
Thanks, @JayR. It is useful for another texture that I should design. I will use it.
@Meysam_Ebrahimi
Or you could check out an old post: How to make a 3d fingerprint from a flat scanned one
And download ZSurf4, its a great little software for heightfields from bitmap…
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Pascal @andy Do these displacement-commands at all work with 16 bit greyscale internally?
One never gets smooth displacement with just 256 levels of grey, it’s always ugly.