underwater reflection faces wrong direction

aidanstoneauthor

I've tried to change this without sucess. The camera angle and scene placment are what I want, but the underwater part of his legs has to severe of an angle. Thanks for any help you can offer. Aidan

Chohole

How much refraction do you have on your water?  water refraction is 1.33

mjc1016

Also what renderer...and which shader?

SpottedKitty

I'm not sure if I'd call that angle "too severe". Refraction can pull very odd tricks if you haven't gone fairly deep into the maths behind it — there are points in the angle of view where you do get things going waytheheckoutthar at Very Weird™ angles. Note that if you bring the camera down a little bit more, his legs will vanish altogether (what's happening is the refraction angle is high enough to bring his legs apparently "above" the water surface, which is impossible, so you can't see them).

One other gotcha, the value of 1.33 only holds for pure water, it can change depending on what's dissolved or mixed in it.

Chohole

SpottedKitty said:

I'm not sure if I'd call that angle "too severe". Refraction can pull very odd tricks if you haven't gone fairly deep into the maths behind it — there are points in the angle of view where you do get things going waytheheckoutthar at Very Weird™ angles. Note that if you bring the camera down a little bit more, his legs will vanish altogether (what's happening is the refraction angle is high enough to bring his legs apparently "above" the water surface, which is impossible, so you can't see them).

One other gotcha, the value of 1.33 only holds for pure water, it can change depending on what's dissolved or mixed in it.

True, but is the best one to use in Bryce.

aidanstoneauthor

Thank you very much all. I'm going to check on the 1.33 refrraction level and if that doesnt work, I'm going to cut the frame at the water line on his legs.

AndyGrimm

Iray: you will get the best possible results using a fresnel algorythm on the water shader! 

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