I have a really fast way of creating a Sierpinski triangle triangle:
(I forgot I don't have my calculator now >:( I'll post the code tonight)
Anyway, it takes less than a minute to generate a Sierpinski triangle filling most of the screen, compared to the chaos game method, which takes much longer.
The one limitation is that the triangle has to be isosceles and right, and the legs need to be horizontal and vertical.
Can anyone guess what method I am using?