https://www.patreon.com/posts/how-to-create-39749424

Yes, we (thepancake1 and I) discovered how! And I’m happy to report it is very easy too despite past concerns with rings being VFX, which it turns out they aren’t, so this tutorial won’t be difficult. Depending on what you want to do, you will either need basic retexturing experience for just the ring textures, or experience with Blender in order to create a new plumbob mesh. This tutorial will not cover how to retexture or mesh, only creating a new plumbob, so please refer to beginner tutorials for objects if you do not know how.

Note: We discovered this a few days ago and there is a chance I missed something during testing/writing. If you notice a detail missing or discover something new, please let me know so that I can update the tutorial.

Edit: I updated the tutorial with marked steps, also uploaded 2 clonable base files for you to use to make the process slightly easier and edited the tutorial in some areas to reflect that.

Step 1: The first thing you want to do is clone PlumbobPCMe (1 texture), or one of my base files as a new project (choose the 2 or 3 textures, I explain more further down). You can do so by going to Object > Create 3D Mesh. Make sure you added my base file to your Sims4Studio's Mods folder (in Documents) before opening the program.

Step 2: To find my base file select Custom from the drop down menu called "Content" and tick the “Show Debug Items”. Mine should be listed with my name, though you may have to squint to see it (sorry about that, hopefully you don't have a lot of custom objects)

For EA's plumbob, type in “plumbobPCMe” to the search bar and check “Show Debug Items” box. PlumbobPCMe should be the first and only option, you can hover over the item to be sure.

Step 3: Select it, name and save your package. If you are using one of my base files or only need one texture from the EA plumbob you cloned, skip to Step 6 (though feel free to read this section to understand the number of textures), otherwise continue here if you are using EA's plumbob and need more than one texture.

Go to the Warehouse and delete the original EA Model file. Next, go to Tools > Game File Cruiser (GFC). For those who are unaware, GFC allows you to search for items that are normally not available in the object catalog, or inaccessible through other means. It has the sounds, every texture, world meshes, etc.

Below is a list of ALL human, occult, and club leader plumbob Model instances that I could locate (and will update for new occults/finds). While the occult type doesn’t matter in the long run, we do need to choose a base depending on what you want to make. Each file type has a different number of allowed textures/shaders, so whichever one you choose allows you to use more textures and customize if they change color or not when motives are low (more info later). My base files are clones of the Alien plumbob and the Alien club leader plumbob, so hopefully you chose the right one for your idea. Note that it should be possible to get more textures by importing another objects Model, then altering the shaders, but I won't be covering that.

One Texture/Shader

Human Plumbob (PCMe) - 0244A8961273BE6D

The other PC/NPC plumbobs in the debug catalog (seemingly unused and leftover from Olympus) can be used as a clone and model base as well, but they have not been tested.

Human Plumbob (PCYou) - 4E3FDE015A898384

Human Plumbob (NPC) - DCFE38B04E9AB301

Human Plumbob (PCOther) - D3160104D3A479E7