# Are there any articles or videos about Ray Tracing View Mode? **URL:** \ **Category:** World Creation\ **Tags:** unreal-engine, Ray-Tracing, question\ **Created:** [March 14, 2025, 2:38am UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131 "2025-03-14T02:38:22Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![tancen](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tancen](https://forums.unrealengine.com/u/tancen)\ **Post date:** [March 14, 2025, 2:38am UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/1 "2025-03-14T02:38:22Z")
Through the Stat SceneRendering command, I located Finish Gather Ray Tracing Instances, which took a lot of Draw Time in my level, and then I changed the View Mode to Ray Tracing Debug - Instances, after which my screen was filled with various color blocks. I don’t know what these colors mean, and I tried to search “Unreal Engine Ray Tracing Debug View Mode” on Google, but found nothing. Can anyone share knowledge about Ray Tracing Debug View Mode in UE5 for performance optimization? Thanks ---
**Author:** ![BRGEzeHulton](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BRGEzeHulton](https://forums.unrealengine.com/u/BRGEzeHulton)\ **Post date:** [March 14, 2025, 2:37pm UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/2 "2025-03-14T14:37:22Z")
Hello Tancen, I found some documents and tutorials on the topic. Doc > **[Designing Visuals, Rendering, and Graphics with Unreal Engine | Unreal Engine...](https://dev.epicgames.com/documentation/en-us/unreal-engine/real-time-ray-tracing?application_version=4.27)** > > Rendering subsystem including lighting and shadowing, materials and textures, visual effects, and post processing in Unreal Engine. > **[Ray Tracing Performance Guide in Unreal Engine | Unreal Engine 5.5...](https://dev.epicgames.com/documentation/en-us/unreal-engine/ray-tracing-performance-guide-in-unreal-engine)** > > A selection of topics for improving performance of ray tracing features in your Unreal Engine projects. > **[Debug ray-traced effects | High Definition RP | 17.0.4](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition%4017.0/manual/Ray-Tracing-Debug.html)** Tutorial [![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/f/d/2fda0b30dd0d1049a58954ddd14e95fd8a01ee59.jpeg "Dive Into Real-Time Ray Tracing for Archviz with Unreal Engine | Webinar") ](https://www.youtube.com/watch?v=wwSs9mdOlA0&t=2020) [![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/0/d/80dcaadaf7581033e86d8bef1e96c9d981a75022.jpeg "Real-Time Ray Tracing in Unreal Engine/ Ray tracing tutorial/Photo realistic rendering in Unreal") ](https://www.youtube.com/watch?v=hKV8ijwJg9k) Feel free to share if you’re still facing challenges or have new questions. ---
**Author:** ![tancen](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tancen](https://forums.unrealengine.com/u/tancen)\ **Post date:** [March 15, 2025, 4:09am UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/3 "2025-03-15T04:09:53Z")
Thanks, although this doesn’t tell me what those color blocks mean, nor does it tell me how to reduce the cost of Finish Gather Ray Tracing Instances, but these are all useful knowledge ---
**Author:** ![BRGEzeHulton](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BRGEzeHulton](https://forums.unrealengine.com/u/BRGEzeHulton)\ **Post date:** [March 17, 2025, 3:12pm UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/4 "2025-03-17T15:12:09Z")
Hi Tancen, I found something that can help you. It’s a document about the Raytracing Guide from NVIDIA. > **[UE5+Raytracing+Guideline+v5.4.pdf](https://dlss.download.nvidia.com/uebinarypackages/Documentation/UE5+Raytracing+Guideline+v5.4.pdf)** > > 2.56 MB Videos: [![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/e/0/8e0d572191014a3f7733dfb9181dad8c89f3f6b2.jpeg "Real-Time Path Tracing in Unreal Engine 5 | Unreal Fest 2024") ](https://www.youtube.com/watch?v=zD9kS1nOuyU) [![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/a/6/1a6ffc9af9de519ccc4184ae6a36be01dd1b70e6.jpeg "Optimizing UE5: Advanced Rendering, Graphics Performance, and Memory Management | Unreal Fest 2024") ](https://www.youtube.com/watch?v=dj4kNnj4FAQ) What I know about the topic **Meaning of the color blocks:** The engine assigns each instance a unique color in this debug view, so the scene appears as a patchwork of colored shapes. There isn’t a specific “value” tied to each color; the colors are just visual separators to help you count and identify individual instances about the ray tracing instances, Here are several techniques to reduce the cost: **Reduce the number of ray tracing instances:** Aim to combine or remove objects so that fewer distinct instances go into the TLAS. Each instance has overhead on the CPU (for traversal and culling) and GPU. - Merging static meshes - Using Instanced Static Meshes - Remove redundant or tiny objects **Cull ray tracing instances effectively** **Minimize dynamic instance updates** **Exclude non-essential objects from ray tracing** **Use profiling tools to iterate** **Use profiling tools to iterate** - using `Stat SceneRendering` - using `Stat D3D12RayTracing` to see ray tracing memory and BLAS/TLAS stats - Using **ray tracing picker** tool Everything I’m discussing can be found in the NVIDIA documentation. Feel free to share if you’re still facing challenges or have new questions. ---
**Author:** ![tancen](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tancen](https://forums.unrealengine.com/u/tancen)\ **Post date:** [March 19, 2025, 9:20am UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/5 "2025-03-19T09:20:06Z")
I’m sorry that I haven’t dealt with this post in time because I have been conducting more in-depth testing and research on this issue these two days. The methods you mentioned are very effective, thank you very much ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [April 18, 2025, 9:20am UTC](https://forums.unrealengine.com/t/are-there-any-articles-or-videos-about-ray-tracing-view-mode/2389131/6 "2025-04-18T09:20:45Z")
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