There is a new version of this engine here : https://scratch.mit.edu/projects/415639506 Click 3 times to add a triangle. Each corner will be where you clicked, so not in the same spot. R to reset. Version 1.1.0
Made by Hat_Mch1 Issues : A triangle appears on the second click. Reseting when you have an incomplete triangle messes things up. Sometimes triangles are not triangular. Updates : 6-9-20 : Changed notes inside project to be more helpful. 10-23-19 : Added darkness support, available to change through the engine only. 8-12-19 : Revised the engine to only fill the triangle depending on its size. This can improve performance and make better fills on bigger triangles. 7-31-19 : Attempted to stop triangle from appearing on second click. Didn't work. 7-30-19 : Release. Has basic functionality and notes inside for anyone looking to use the Poly Graphics Engine.