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On 07/08/2013 04:26 AM, s.day wrote:
> William F Pokorny <ano### [at] anonymous org> wrote:
>> I've been trying for fuzzy isosurfaces on and off.
>
> I would say less attemting and more succeeding, they look very fuzzy to me. I
> guess this would only work with short hairs though?
>
> Sean
>
Thanks & yes, I think OK for short hair like we might find in some
carpet, children's stuffed animals, nerf balls and such. With the right
coloring/layering might make a decent grass from a distance. There is a
little room for making things more or less fuzzy by changing the shapes
noise frequency and magnitude, but not a lot.
I think asymmetric noise might get us a rough tree bark like surface too
but I've not played with this thought much beyond a render or two which
looked promising.
The really "fuzzy" iso performance is not that great because the max
gradient has to be high to see the fuzz through AA.
Aside: As the max gradient drops below that required for the selected
noise frequency, the two sided skin becomes quickly semi-transparent in
a way where shape portions running longer with the camera rays are more
visible. An effect which might sometimes be useful itself. If in the
example code in this thread, the max gradient is lowered to 2, we get
the attached image which due the low max gradient renders quickly.
Bill P.
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