smoothstep

Just curious. So, I’m doing shadow mapping. Its working on my mac ati card. After taking 9 samples from subroutines I was just calling clamp( myshadowmult, 0.0, 1.0 ). But if I changed that to smoothstep then the entire thing stops working on my radeon 9800. Things were already pretty tight with the pcf stuff. Why would that make it blow?

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