duck

            MeshFilter planeMF = plane.GetComponent<MeshFilter>();
            Mesh planeMesh = new Mesh();// planeMF.mesh;

            Vector3[] verts = new Vector3[] {
                new Vector3(0, 0, 0),
                new Vector3(1, 0, 0),
                new Vector3(1, 0, 1),
                new Vector3(0, 0, 1)
            };

            int[] tris = new int[] { 0, 2, 1, 3, 2, 0 };

            Vector2[] uv1s = new Vector2[] {
                new Vector2(0, 0),
                new Vector2(1, 0),
                new Vector2(1, 1),
                new Vector2(0, 1)
            };


            // Assign mesh properties
            planeMesh.vertices = verts;
            planeMesh.uv = uv1s;
            planeMesh.triangles = tris;
            planeMesh.RecalculateNormals();
            planeMesh.RecalculateBounds();
            planeMF.mesh = planeMesh;