filters to use for my pictures?

[mario]

yup, no filters in any photos, the first one (single triangle) was done on a computer after the picture was taken, putting a triangular filter on to the lens would not have that effect at all, the only way i can think of to have that effect whithout using a computer to post-process would be to set up a very intricate sistem of flashes, lights and shades arround the set, very unlikely tho.
the second picture (with many triangles) is actually a triple exposure, it is possible to do that with a camera woithouth a computer, but i suspect it was done on a computer, on it you can see 3 distinct shots, one is of a girl standing in front of a painting, an other one is of a pice of paper with the triangles pattern cut out, and the last one is a starry sky.