### Author:  [@kit](https://discourse.vtk.org/u/kit)
#### Post date: [November 26, 2020, 3:19pm UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/1 "2020-11-26T15:19:43Z")
Hi,
I was experimenting with the image slicing example
>
which are really nice btw. But if I change
`mapper.setSlicingMode(SlicingMode.Z)`
to
`mapper.setSlicingMode(SlicingMode.Y)`
The rendered image disappears (no errors). I was expecting it to take the slices using a Y- orthogonal plane instead. What else do I need to change?
---
### Author:  [@Forrest](https://discourse.vtk.org/u/Forrest)
#### Post date: [November 30, 2020, 5:58pm UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/2 "2020-11-30T17:58:28Z")
Hi Kit,
Have you updated your camera as well? The rendered slice respects world orientation, so showing a Y-slice when the camera is looking down the Z axis will “disappear” from the camera’s POV.
---
### Author:  [@kit](https://discourse.vtk.org/u/kit)
#### Post date: [December 3, 2020, 3:58pm UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/3 "2020-12-03T15:58:42Z")
That was it. Thanks.
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### Author:  [@h4rry](https://discourse.vtk.org/u/h4rry)
#### Post date: [December 30, 2024, 11:12pm UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/4 "2024-12-30T23:12:03Z")
Hi, i’ve tried updating the camera by calling `renderer.updateCamera()`, but browser throws an error (activeCamera.render() is not a function)
Do I have to manually update the parameters (viewUp, directionOfProjection, etc) instead?
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### Author:  [@finetjul](https://discourse.vtk.org/u/finetjul)
#### Post date: [December 31, 2024, 2:06pm UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/5 "2024-12-31T14:06:39Z")
Indeed, `renderer.updateCamera()` seems to not apply for “regular” cameras (but remote cameras)…
I’m not sure to understand what you are trying to do…
---
### Author:  [@h4rry](https://discourse.vtk.org/u/h4rry)
#### Post date: [January 1, 2025, 1:28am UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/6 "2025-01-01T01:28:17Z")
I’m switching between different slicing modes (X, Y, Z) within the `image-slicing.js` to view the volume from different planes (axial, sagittal or coronal).
If I change `mapper.setSlicingMode(SlicingMode.Z)` to `mapper.setSlicingMode(SlicingMode.Y)` or `mapper.setSlicingMode(SlicingMode.X)`, the renderWindow just turns black. I know that I have to update the camera properties, just not sure which values to set for each slicing mode.
---
### Author:  [@finetjul](https://discourse.vtk.org/u/finetjul)
#### Post date: [January 2, 2025, 8:50am UTC](https://discourse.vtk.org/t/vtk-js-image-slicing-basics/4739/7 "2025-01-02T08:50:40Z")
Gotcha,
When you change slicing mode, your camera focal point does not change.
You only need to change the camera position.
It should be `newCameraPosition = focalPoint + distance * newSlicingNormal`. where distance could be the one before changing the slicing mode: `distance = cameraPosition - focalPoint`.