Image original size is at 90MB, but I managed to shrink it to 26MB by removing background texture.
Image link: https://cardse.net/image/sierpinski-triangle-10k-render.cSD
Man, I love pictures you can zoom deep into.!
Here is a low-quality image to what the image link will show.
Ways I could improve the illustration was to improve the lighting, as the shadow inside the triangle ruins the immersion.