ah,
well, in the case of distorting the ray direction you would,
but i was only modifying the ray colour ...
am i still talking nonsense? honestly i wouldn't surprised if i was :/
benpee
jordibares wrote:
That is correct, but you would be modifying the rays, don’t you? Did I
missunderstood?
thx
jb
On 18/1/07 05:05, "benp" <benp(at)rsp.com.au> wrote:
hmm, i have an old memory that lens shaders only enforce raytracing if
you try to modify the ray? (like you would if you were trying to
to lens
distortion of course..)
i thought i had an old lens shader i worte that i just did colour
look-ups in (no modding the ray) that worked in scan line??
then again, it was a long time ago :/
jordibares wrote:
>
>
> >
> > It would be really nice that lens ditortion shader and motion
> vector shader
> > like each other.
>
> True. Would be nice.
>
> And very expensive as lens shaders force mental ray to do raytracing
> all the way through instead of using the hybrid scanline/raytrace
> optimized method.
>
> jb
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