Dear All<br><br><br>I am writing a program in VTK that takes some data, performs some operations, and spits out a 4-component RGBA array. The RGBA has in fact non-zero opacity values for the relevant regions, and for those regions also the R value to a constant (255). I am rendering this array with vtkFixedPointVolumeRayCastMapper, using independent input array components (RGBA). <br>
<br>The probem is that I get a rather blocky appearence in my final image (I use the heart.vtk and the ironprot.vtk datasets from the examples folder in VTK). <br>I was wondering if this might be because the dataset resolution is low (32x32x32), or because I do not set some parameters right in my input dataset. Maybe VTK's volume rendering explicitly needs some gradient computations, which is not done automatically when rendering, but rather needs to be initialized when creating a new vtkImageData object and setting the RGBA array as the object's scalars?<br>
<br><br>Any help will be greatly appreciated!<br>Best,<br>Adrian<br>-- <br>---------------------------------------------------<br>Adrian Albert<br>School of Engineering and Science<br>Jacobs University Bremen<br>Germany<br>
Tel.: 00494212003258