Quad is short for quadrilateral, a 4 sided shape. Quad meshes are ideal for digital sculpting and 3d animation. Sculpting on a mesh with a mixture of quads and non quads can result in pinching and sharp angles in unwanted areas. Here I present some cases where polygons can be converted into quads.

1) **Quad adjacent to a triangle**

Add a line in the centre of the quad.

2) **Two Quads adjacent to a pentagon (5 sided polygon)**

Add a line to the centre of the pentagon.

3) **septagon (7 sided polygon) sandwiched between 4 quads and 2 quads**

*Split the septagon as shown.*

4) **Ring of triangles (even number)**

Remove half the lines to merge triangles into quads.

5) **Ring of Triangles (odd number)**

Remove half the lines and add a point to the remaining triangle.