How I can use two colors for two sides (top,inner) of a custom shape.
From my 1st attempt on multicolor w/ shapes on “p5.js” I believe it’s not currently possible: 
For now you can at least code in “Java Mode / Pjs” for that multicolor effect: 
@GoToLoop thanks for the reply I thought the same. I couldn’t find any source for two side color for a Vertex. So I tried a work around
by duplicating same vertex with 1px. But its not working as expected while converting points to 3D object.
Please check the codepen demo