:-) nitrogen, how many seconds do you render the same scene with antialiasing, and without antialiasing ? Let's say the scene 512x384 .

I think it will be hard for me to implement kd-tree , but I must do this,
because I have imported a 3DS mesh, that contains only about 4 500 Triangles, and my raytracer is horribly sloow. Really, very slow :?

Also, have you tried the soft shadows ? I Plan to this, but really after
it get more speed