How to generate texture for hexagon tile?

Hi i am using LWRP to generate Hexagon style tile map.

In LWRP, cant create script shader directly, therefore I generate another way 1. generate mesh and collider for tile from script 2. add materials ( LWRP-Lit) to gameobject 3. generate texture and import to material

Concept like this ..

My question is how could i generate hexagon size texture for tile from script ( because i going to change

color of tile when an event occurs )

Generate hex tile code following from link below.

thanks to read.

https://catlikecoding.com/unity/tutorials/hex-map/part-1/