# change blendMode in vtkResliceCursor

**URL:** https://discourse.vtk.org/t/change-blendmode-in-vtkreslicecursor/9311
**Category:** Development
**Tags:** python
**Created:** [September 10, 2022, 4:11am UTC](https://discourse.vtk.org/t/change-blendmode-in-vtkreslicecursor/9311 "2022-09-10T04:11:50Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Alexandera](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Alexandera](https://discourse.vtk.org/u/Alexandera)
#### Post date: [September 10, 2022, 4:11am UTC](https://discourse.vtk.org/t/change-blendmode-in-vtkreslicecursor/9311/1 "2022-09-10T04:11:50Z")

</div>

My environment is Python 3.7.0 and VTK 9.1.0  
I am realizing my own MPR application with example. The following is the snapshot on the rendering window.

 ![截屏2022-09-10 下午12.02.49](https://discourse.vtk.org/uploads/default/original/2X/8/8b50413695457c6eb78fb9b4de8f84989cac31c3.jpeg)

I know the class vtkResliceCursorWidget internally uses vtk [vtkImageSlabReslice](https://vtk.org/doc/nightly/html/classvtkImageSlabReslice.html), so that it can change the thickness of slice. However, I want to use my own BlendMode (MIP, MEAN MIN or etc). I cannot find the specific way to get the internal object of vtkImageSlabReslice. Anyone can help to give some clues? Do I need to build up the whole wheel myself from the beginning of vtkImageResliceSlab?

 ![截屏2022-09-10 下午12.10.25](https://discourse.vtk.org/uploads/default/original/2X/c/c5cfcc701ccd33086b96f3f7daf9ce10dafd39d9.png)