Here are some examples of PowerPoint slides that cleverly use layering to create a "woven fabric" effect. Why clever? Take the circle for example with the arrow flying through. Part of the circle needs to below the arrow, part on top. The solution? Cut the circle in half... The interwoven arrows have small square blocks in the right colours pasted in the relevant junctions, and the spiral was a bit tricky, placing small black cut outs on the junction with the blue arrow.