Is there a limit of vertices in WebGL?

Question

Three.js says that can\'t be loaded more than 65k vertices. In my pure webgl application, it doesn\'t say anything, but it doesn\'t show the entire object when I try big obj

Answer 1

Generally the other answers are correct, but I figured I would add a bit of clarification:

The only data types accepted by WebGL (and OpenGL ES 2.0) for indices are unsigned bytes and unsigned shorts. Since an unsigned short has a range of 0-65535, this means that if you are using gl.DrawElements (which most frameworks do) you can only reference 65k vertices per draw call. This is almost certainly where the three.js restriction comes from. Please note that you can have a lot more than 65k triangles in one draw call, as long as they only share 65k verts.

If you use non-indexed geometry (gl.DrawArrays), you can have a lot more vertices per-call, but bear in mind that almost always have to repeat some of them. I think in most cases the reduction in GPU memory usage will justify splitting up the draw calls.