# Adding Light to the volume I am rendering
**URL:** https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270
**Category:** Web
**Created:** [September 21, 2020, 5:00pm UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270 "2020-09-21T17:00:13Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@samm-vs](https://discourse.vtk.org/u/samm-vs)
#### Post date: [September 21, 2020, 5:00pm UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/1 "2020-09-21T17:00:13Z")
I was able to get my volume rendered and it looks very nice but I would like to add a light from like an angle so the shadows will give the user a better view of the volume. I saw that I can use vtkLight, is there any example on how to use it. Or is there a different way to create what I want. My issue is that this is a vti object so I want to make sure that after irrelevant values (opacity set to 0) are taken out, what is still visible can still have shadows.
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### Author:  [@Aron\_Helser](https://discourse.vtk.org/u/Aron_Helser)
#### Post date: [September 21, 2020, 6:11pm UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/2 "2020-09-21T18:11:37Z")
Try starting here: [https://lorensen.github.io/VTKExamples/site/Cxx/Lighting/Light/](https://lorensen.github.io/VTKExamples/site/Cxx/Lighting/Light/)
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### Author:  [@Dave\_DeMarle](https://discourse.vtk.org/u/Dave_DeMarle)
#### Post date: [September 22, 2020, 10:37am UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/3 "2020-09-22T10:37:29Z")
You might also want to try VTK’s OSPRay interface.
As far as I know GL rendered volumes in VTK can not cast or receive volumes. However OSPRay rendered volumes in VTK can cast them and in master with OSPRay 2 at least they can also receive them with either path tracing or ray casting and vtkVolumeProperty::ShadeOn().
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### Author:  [@Dave\_DeMarle](https://discourse.vtk.org/u/Dave_DeMarle)
#### Post date: [September 22, 2020, 10:38am UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/4 "2020-09-22T10:38:59Z")
Apologies, I see now that this is in the Web area. OSPRay is not applicable in the vtk-js space.
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### Author:  [@samm-vs](https://discourse.vtk.org/u/samm-vs)
#### Post date: [September 22, 2020, 5:47pm UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/5 "2020-09-22T17:47:44Z")
I will check it out
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### Author:  [@samm-vs](https://discourse.vtk.org/u/samm-vs)
#### Post date: [September 22, 2020, 5:48pm UTC](https://discourse.vtk.org/t/adding-light-to-the-volume-i-am-rendering/4270/6 "2020-09-22T17:48:42Z")
Well in volume property there is a way to set shade to 1. However, I couldn’t see a change in my volume after I changed it but thank you!