# Turn environment map to z-up
**URL:** https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432
**Category:** Development
**Created:** [October 5, 2023, 10:30pm UTC](https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432 "2023-10-05T22:30:06Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Sean\_Curtis](https://discourse.vtk.org/u/Sean_Curtis)
#### Post date: [October 5, 2023, 10:30pm UTC](https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432/1 "2023-10-05T22:30:06Z")
I’m adding environment maps for the first time. I work in a z-up world. When I simply naively add an equirectangular map as environment map (and skybox), it’s clear that the world in the skybox and in observed in the reflection is a y-up representation. In the image below, the world y-axis goes off to the right.
Now, I can set the floor equation of the skybox to lie on the Wz = 0 plane. And, in the rendering, the skybox is now rendering z-up as I would expect. However, the reflections still reflect a y-up world. (See image below):
I’ve tried setting a transform on the texture passed as the environment map, but that seems to have no effect. Am I missing something? How do I inform the `vtkOpenGlRenderer` that the spherical coordinates should have the poles on the z-axis instead of the y?
---
### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [October 6, 2023, 10:26am UTC](https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432/2 "2023-10-06T10:26:17Z")
```auto
// skybox orientation
double front[3];
vtkMath::Cross(this->RightVector, this->UpVector, front);
this->SkyboxActor->SetFloorPlane(this->UpVector[0], this->UpVector[1], this->UpVector[2], 0.0);
this->SkyboxActor->SetFloorRight(front[0], front[1], front[2]);
// environment orientation
this->SetEnvironmentUp(this->UpVector);
this->SetEnvironmentRight(this->RightVector);
```
From: [https://github.com/f3d-app/f3d/blob/master/library/VTKExtensions/Rendering/vtkF3DRenderer.cxx](https://github.com/f3d-app/f3d/blob/master/library/VTKExtensions/Rendering/vtkF3DRenderer.cxx)
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### Author:  [@sankhesh](https://discourse.vtk.org/u/sankhesh)
#### Post date: [October 6, 2023, 1:04pm UTC](https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432/3 "2023-10-06T13:04:17Z")
As @mwestphal suggested, you should use the `vtkRenderer::SetEnvironmentUp` and `vtkRenderer::SetEnvironmentRight` to re-orient the map.
---
### Author:  [@Sean\_Curtis](https://discourse.vtk.org/u/Sean_Curtis)
#### Post date: [October 6, 2023, 2:21pm UTC](https://discourse.vtk.org/t/turn-environment-map-to-z-up/12432/4 "2023-10-06T14:21:54Z")
I feel foolish. The documentation for `SetEnvironementUp()` is _right below_ the documentation for `SetEnvironmentTexture()`. Thank you for such a swift and helpful response.
For the sake of completeness:
1. `vtkRenderer` already sets the environment right to be [1, 0, 0].
2. Therefore, it was enough to set the environment up to be [0, 0, 1] to get the desired result.
