# About GPU Raycast

**URL:** <https://forums.unrealengine.com/t/about-gpu-raycast/1179544>\
**Category:** C++\
**Tags:** unreal-engine, CPP, question\
**Created:** [May 26, 2023, 5:40pm UTC](https://forums.unrealengine.com/t/about-gpu-raycast/1179544 "2023-05-26T17:40:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kaz.12051](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@kaz.12051](https://forums.unrealengine.com/u/kaz.12051)\
**Post date:** [May 26, 2023, 5:40pm UTC](https://forums.unrealengine.com/t/about-gpu-raycast/1179544/1 "2023-05-26T17:40:18Z")

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Hello, I am looking for a LiDAR simulator.  
I am looking to run Raycast with GPU.  
I guess I need to use CUDA in c++ or have knowledge of Compute Shader to achieve this.  
However, I have no knowledge of both.  
Can someone please give me the information I need to fire Ray on GPU.  
I am looking forward to your reply.

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**Author:** ![3dRaven](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/3draven/32/906552_2.png) [@3dRaven](https://forums.unrealengine.com/u/3dRaven)\
**Post date:** [May 26, 2023, 5:53pm UTC](https://forums.unrealengine.com/t/about-gpu-raycast/1179544/2 "2023-05-26T17:53:14Z")

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This thread might interest you

> [@Parallel Raycast for Lidar simulation](https://forums.unrealengine.com/t/parallel-raycast-for-lidar-simulation/612158/5):
>
> @JamesYoo82 message me at [devblitzer@gmail.com](mailto:devblitzer@gmail.com) ? I am collaborating with other researchers/engineers and think you’d be interested to learn more.

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**Author:** ![kaz.12051](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@kaz.12051](https://forums.unrealengine.com/u/kaz.12051)\
**Post date:** [May 27, 2023, 2:43pm UTC](https://forums.unrealengine.com/t/about-gpu-raycast/1179544/3 "2023-05-27T14:43:13Z")

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Thanks for sharing this very interesting article!  
This article explains the use of shaders to implement ray tracing, correct?  
I found this article to be very valuable and more informative than the Unreal Engine reference.  
Thank you so much.