Subdivision glitch?

[King]

Im trying to subdivide a plane into even sqaures but instead of squares it divides it into triangles. I cant find anything regarding this so far.Thanks

[Kumquat [Velbud]]

Well, think about it this way. The system of subsurf is designed to work on triangles since it is the simplest form of facial mesh, not the square. A square can be deformed and divided into a triangle thus you get triangle when it is subdivided. The best way to bypass this, at least to my experience, would be to cut the mesh into the squares and then testing if subdivide got the idea. Sometimes it works. Other times, it kind of works, but you are required to do some work, and it is possible for it to not work. I just recommend taking my word and doing it yourself and experiment. It's not a glitch. It's just that you are getting a result you dont want.

[still__alive]

Well I fired up Blender here just to see, because dividing into triangles doesn't sound right to me. Pretty sure most, if not all, operations will try to keep the mesh as quads if possible, because of how tris "break" the mesh and make it harder to work with.

I added a plane, 4 corners and all quads, and then used both the subsurface modifier, and the subdivide tool, and both methods divided the plane into squares, not triangles. If I add triangles, then it will subdivide the square that was converted to a tri as more triangles, but the square parts stay square for me.

So it is either a bug, user error, or we are missing some kind of information. Maybe you have some triangles or extra verts or something in your plane mesh? Or maybe you happened to bump the ctrl+t (convert to tris) hotkey? Is your plane connected to other faces that you are not subdividing that might have topology causing this behaviour?

[Scre]

before and afhter screenshot please :)