[vtkusers] Differences Result between CPU rendering and GPU rendering with VTK

[Sankhesh Jhaveri]

Stephen,

Use ray jittering and set sample distance to smaller values (caution:
performance trade-off here).

Sankhesh
​

On Thu, Mar 15, 2018 at 8:13 AM Elvis Stansvik <elvis.stansvik at orexplore.com>
wrote:

> One thing you could try to get rid of the woodgrain artifacts is to
> enable jittering (UseJitteringOn()).
>
> Elvis
>
> 2018-03-15 8:00 GMT+01:00 Stephen Zucker <zoequella at gmail.com>:
> > Dear All,
> >
> > When i use same colorFunction、scalarOpacity, gradientOpacity to render
> the
> > same Medical Image data, I found the rendered result of
> > CPU(vtkFixedPointVolumeRayCastMapper) and GPU(vtkGPUVolumeRayCastMapper)
> are
> > different.
> > I think the CPU rendered result is better then GPU，the GPU rendered
> result
> > has too many colourful spots and ribbon. But with GPU rendering, the
> > operation is smoother.
> > The rendered result is as follows:
> > <http://vtk.1045678.n5.nabble.com/file/t342362/CPU.png>
> > <http://vtk.1045678.n5.nabble.com/file/t342362/GPU.png>
> >
> > So can you help me to improve the rendering effect of the GPU?
> >
> > Thanks in advance,
> >
> > Zucker.
> >
> >
> >
> > --
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-- 
Sankhesh Jhaveri *Sr. Research & Development Engineer* | Kitware
<http://www.kitware.com/> | (518) 881-4417
​
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