refraction causing wrong shadow results

[secondplace]

hi,

i'm trying to render caustics in a pool. as in the docs and every tutorial i looked at i need to turn off 'affect shadows' in the material settings. this however results in a very spread shadow which should not be the case.
in this image you can see in the photo on the left the water will not blur the shadow. where as in the render the shadow (and caustics for that matter) just blur.


i'm using only a single vray sun light source at the moment. and vray 3.5.

i tried to figure this out for several hours now. could you point me in the right direction here?

nick

[Raven]

What are your caustic settings?

Maybe add more caustic subdivs to your light.

[secondplace]

i guess it's the trade-off mentioned in the docs. low but sharp with noise or clean but blurry. i'm not 100% sold on the solution because the results are wrong.
if i have a low setting which still blurs (too much) i will even have caustics noise if the surface is completely flat.