How to cut jpg shape out of ring

Support Modeling
1

Hey guys,
I am super new to blender and would like to get going with a project I have in mind. Here it would be really helpful if someone could take me by the hand.
Here’s the project:

  • Create ring (can do)
  • import shape from jpg
  • wrap shape around ring (make sure its long enough)
  • cut out shape from ring

The shape looks something like this:

a_blurry_line_by_bebesdupoire-d4gjhry.png883×904 86.9 KB


1315588494_14K-Yellow-Gold-Ring-Band-Wedding-4.15mm-Width-Sz-7.75_2.jpg1679×1766 928 KB

The b/w gradient of the shape determines the depth of the cut.
Black cuts through the ring, white leaves the surface untouched.

I would be superhappy if someone could guide me through this process. I am so excited to start playing with all this …
Thank you everyone,
Markus

2

One option is to use displacement on the vertices. There are few problems with that though

screen.jpg1918×975 344 KB

One is that the image is not seamless, the ends don’t meet at a common point. Second is that the sides of the image are darker, creating a line. And third is that .jpg format is crap. It’s a lossy format. Png is lossless in visual range of values (0-1). An image with at least 16bit bit depth is recommended for displacement and bump, and you want a 16 or 32 bit hdr image if the values go outside the 0-1 range, such as .exr.

Might still be able to use that though if the actual values don’t matter, and you’re creating a lower resolution mesh for it.

3

Hi

to continue on JA12s answer, download krita from krita.org, create a new image with the size you prefer, hit w for seamless painting, paint the image again, save it as 16 bit png. That is what I would do at least

/erik