How to combine two shapes with different number of vertices into one shape as shown in the image`

[HiGreg]

@Vigneshwaran_Sivaram

I understand that I could use CSG for boolean operations, but whenever I do this type of stuff in Blender I usually have the hole embedded with the mesh.

I’m not sure what this means? Are you trying to create a flat mesh plane that has a hole, all as one mesh?

You might be able to use native CSG objects. Or you can create a mesh for the plane and a mesh for the hole. Then use CSG to suntract the hole from the plane, and turn the result back to a mesh. Voila! A plane mesh with a hole.

There are no articles on adding and removing model vertices？

Consider using CSG to create your model. Create a mesh of the pipe that will be outer thickness. Then an inner mesh that represents the center to be removed. const pipeCSG = BABYLON.CSG.FromMesh(outer); const centerCSG = BABYLON.CSG.FromMesh(center); pipeCSG.subtractInPlace(centerCSG); var pipe = pipeCSG.toMesh("pipe");

If you have trouble aligning the two, create a cylinder and subtract that from the plane.