Displacement with procedural fractals problem

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Displacement with procedural fractals problem

Displacement with procedural fractals problem

2005-03-10 - By Claus, Reinhard

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Reply: 1 2 3 4 5 6 7 8 9 10 >>

That grid structure is actually there in the fractal, but too faint to be
visible when viewed as RGB.
Only displacement brings out this structure. I think it has to do with how the
fractal is calculated.
Maybe "Rock" is an option I used that as a workaround once - it uses a
different algorithm.
Cheers,
Reinhard

-- --Ursprüngliche Nachricht-- --
Von: owner-xsi@(protected) [mailto:owner-xsi@(protected)]Im Auftrag von
Axel Akesson
Gesendet: Donnerstag, 10. März 2005 17:11
An: XSI@(protected)
Betreff: Displacement with procedural fractals problem

Hello,

We have a problem here at the moment.
When using a 3D fractal or a 2D fractal in the rendertree as displacement we
see a grid structure in the displaced surface. The fractal pattern is quite
large (i.e no fine details).
When we render the fractal as a texture map and blur it in the FxTree the
problem dissapears. The grid structure is not visible when we view the fractal
as RGB.
We heard from a programmer friend that this might be a rounding error in the
fractal shader?

This problem occur when using Fine, Parametric and LDA displacement methods.
Also when we pre-subdivide (dividing) the mesh and set subd level to very high
the problem appears.

Any workaround/solution?

Cheers,
Axel
VR

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<DIV>That
grid structure is actually there in the fractal, but too faint to be visible
when viewed as RGB.</DIV>
<DIV>Only
displacement brings out this structure. I think it has to do with how the
fractal is calculated.</DIV>
<DIV>Maybe
"Rock" is an option I used that as a workaround once - it uses a different
algorithm.</DIV>
<DIV>Cheers, </DIV>
<DIV>Reinhard</DIV>
<DIV> </DIV>
<DIV> -- --Ursprüngliche
Nachricht-- -- Von: owner-xsi@(protected)
[mailto:owner-xsi@(protected)]Im Auftrag von Axel
Akesson Gesendet: Donnerstag, 10. März 2005 17:11 An:
XSI@(protected) Betreff: Displacement with procedural fractals
problem </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=Section1>
Hello,<o:p></o:p>
<o:p> </o:p>
We have
a problem here at the moment.<o:p></o:p>
When
using a 3D fractal or a 2D fractal in the rendertree as displacement we see a
grid structure in the displaced surface. The fractal pattern is quite large
(i.e no fine details).<o:p></o:p>
When we
render the fractal as a texture map and blur it in the FxTree the problem
dissapears. The grid structure is not visible when we view the fractal as
RGB.<o:p></o:p>
We
heard
from a programmer friend that this might be a rounding error in the fractal
shader?<o:p></o:p>
<o:p>
 </o:p>
This
problem occur when using Fine, Parametric and LDA displacement methods. Also
when we pre-subdivide (dividing) the mesh and set subd level to very high the
problem appears.<o:p></o:p>
<o:p>
 </o:p>
Any
workaround/solution?<o:p></o:p>
<o:p>
 </o:p>
Cheers,
<o:p></o:p>
Axel<o
:p></o:p>
VR<o:p>
</o:p></DIV></BLOCKQUOTE></BODY></HTML>