# Is it possible to create a light with spot like a ring?

**URL:** https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145
**Category:** Support
**Created:** [August 15, 2022, 9:13am UTC](https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145 "2022-08-15T09:13:45Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![AlexLuya](https://discourse.vtk.org/user_avatar/discourse.vtk.org/alexluya/32/4036_2.png) [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)
#### Post date: [August 15, 2022, 9:13am UTC](https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145/1 "2022-08-15T09:13:45Z")

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Hello,the ring spot must be a ring like this:  
 ![image](https://discourse.vtk.org/uploads/default/original/2X/4/488ee4d105b66608001d82c7dfe5fd6f3afca0d3.png)  
Is it possible to implement it in VTK?

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### Author: ![Dave\_DeMarle](https://discourse.vtk.org/user_avatar/discourse.vtk.org/dave_demarle/32/6_2.png) [@Dave\_DeMarle](https://discourse.vtk.org/u/Dave_DeMarle)
#### Post date: [August 16, 2022, 2:05pm UTC](https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145/2 "2022-08-16T14:05:46Z")

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I don’t think so without coding but I’d be happy to be proven wrong.

One potential path I can think of is through VTK’s OSPRay backend.  
OSPRay can do it, see innerRadius parameter of the Spot/Ring Light in [Intel OSPRay Documentation](https://www.ospray.org/documentation.html)  
But that control is not yet exposed in VTK like the radius parameter is.  
[https://vtk.org/doc/nightly/html/classvtkOSPRayLightNode.html](https://vtk.org/doc/nightly/html/classvtkOSPRayLightNode.html)