# \#refraction **URL:** https://forums.unrealengine.com/tag/refraction/333.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [UE5.7 Refraction Screen Tearing](https://forums.unrealengine.com/t/ue5-7-refraction-screen-tearing/2734545)
**Author:** [@Matrix\_Moddz\_PT1](https://forums.unrealengine.com/u/Matrix_Moddz_PT1)\ **Replies:** 3\ **Last updated:** [July 10, 2026, 4:11am UTC](https://forums.unrealengine.com/t/ue5-7-refraction-screen-tearing/2734545 "2026-07-10T04:11:42Z")
Hi, I have been having this issue in my water for a few engine versions and I cannot get rid of it. Check the right side of the screen (the stretched lines). The issue seems to come from the refraction value, the pix… --- ## [Light Visibility Through Glass Objects/Materials](https://forums.unrealengine.com/t/light-visibility-through-glass-objects-materials/866106)
**Author:** [@EvanHammel](https://forums.unrealengine.com/u/EvanHammel)\ **Replies:** 4\ **Last updated:** [April 20, 2026, 9:22am UTC](https://forums.unrealengine.com/t/light-visibility-through-glass-objects-materials/866106 "2026-04-20T09:22:44Z")
Hi there, I’m using 5.2 Preview 2 to test out what’s new in the world of UE Path Tracing. One thing I still don’t see is the ability to turn off light visibility in refractions. In the example here, I have a skylig… --- ## [Overexposed caustics or light refraction with Path Tracing](https://forums.unrealengine.com/t/overexposed-caustics-or-light-refraction-with-path-tracing/2673267)
**Author:** [@Creo](https://forums.unrealengine.com/u/Creo)\ **Replies:** 0\ **Last updated:** [November 9, 2025, 4:26pm UTC](https://forums.unrealengine.com/t/overexposed-caustics-or-light-refraction-with-path-tracing/2673267 "2025-11-09T16:26:47Z")
Hi, While using Path Tracer and glass materials I’ve faced with overexposed (or over brightened) caustics from glass. First of all, to create glass materials I used official documentation Here is two room renders with… --- ## [Translucent Materials behind Other Translucent Materials Ignore Refraction](https://forums.unrealengine.com/t/translucent-materials-behind-other-translucent-materials-ignore-refraction/1782432)
**Author:** [@Shrooblord](https://forums.unrealengine.com/u/Shrooblord)\ **Replies:** 22\ **Last updated:** [June 6, 2025, 5:51pm UTC](https://forums.unrealengine.com/t/translucent-materials-behind-other-translucent-materials-ignore-refraction/1782432 "2025-06-06T17:51:43Z")
Hey there, I’ve got the problem as detailed in this video: In words, the problem is the following: refraction works through translucent materials, until another material that also has translucency and/or… --- ## [Raytracing Reflections are not looking accurate](https://forums.unrealengine.com/t/raytracing-reflections-are-not-looking-accurate/2511041)
**Author:** [@malik\_217](https://forums.unrealengine.com/u/malik_217)\ **Replies:** 0\ **Last updated:** [May 15, 2025, 7:42am UTC](https://forums.unrealengine.com/t/raytracing-reflections-are-not-looking-accurate/2511041 "2025-05-15T07:42:45Z")
The reflections on my glass does not seem accurate, even though my translucency is set to Raytracing as you can see in the Images below. Mirror doesn’t reflect another mirrors reflection and blueish reflection, seems li… --- ## [Translucent Material - Blurred Reflection](https://forums.unrealengine.com/t/translucent-material-blurred-reflection/2050522)
**Author:** [@Weitagon](https://forums.unrealengine.com/u/Weitagon)\ **Replies:** 2\ **Last updated:** [October 3, 2024, 2:15am UTC](https://forums.unrealengine.com/t/translucent-material-blurred-reflection/2050522 "2024-10-03T02:15:00Z")
Hi All, I was hoping I could get some help understanding what is affecting my reflections here. I have 2 materials here with the settings seemingly exactly the same. The material on the left is able to easily reflect t… --- ## [Impact of Mesh Topology on the Refraction Behavior of Glass in Unreal Engine 5 (Especially Curved Surfaces)](https://forums.unrealengine.com/t/impact-of-mesh-topology-on-the-refraction-behavior-of-glass-in-unreal-engine-5-especially-curved-surfaces/1875284)
**Author:** [@ElhamMalekfar](https://forums.unrealengine.com/u/ElhamMalekfar)\ **Replies:** 1\ **Last updated:** [May 27, 2024, 1:15pm UTC](https://forums.unrealengine.com/t/impact-of-mesh-topology-on-the-refraction-behavior-of-glass-in-unreal-engine-5-especially-curved-surfaces/1875284 "2024-05-27T13:15:15Z")
Impact of Mesh Topology on the Refraction Behavior of Glass in Unreal Engine 5 (Especially Curved Surfaces) Hello Unreal Engine 5 pros, I have a question regarding the impact of mesh topology on the realistic refractio… --- ## [Refractions stop working when material attributes are used](https://forums.unrealengine.com/t/refractions-stop-working-when-material-attributes-are-used/433834)
**Author:** [@Seirei](https://forums.unrealengine.com/u/Seirei)\ **Replies:** 6\ **Last updated:** [August 14, 2023, 1:25pm UTC](https://forums.unrealengine.com/t/refractions-stop-working-when-material-attributes-are-used/433834 "2023-08-14T13:25:19Z")
Hello, I just tried setting up a translucent material with ‘material attributes’ checked and my refraction input suddenly stopped working. Here’s some screenshots to show what’s happening: The only difference is… --- ## [Translucency Clipping Problem with Opaque Objects](https://forums.unrealengine.com/t/translucency-clipping-problem-with-opaque-objects/295773)
**Author:** [@ue24acct](https://forums.unrealengine.com/u/ue24acct)\ **Replies:** 15\ **Last updated:** [August 3, 2023, 2:49pm UTC](https://forums.unrealengine.com/t/translucency-clipping-problem-with-opaque-objects/295773 "2023-08-03T14:49:11Z")
We’re having a problem with the material opacity blend mode. In this simple test case, the opacity node is set to 1.0, so the material should be fully opaque, yet it appears partially transparent. My guess is some z-buff… --- ## [Warping under glass](https://forums.unrealengine.com/t/warping-under-glass/1225660)
**Author:** [@celestia](https://forums.unrealengine.com/u/celestia)\ **Replies:** 5\ **Last updated:** [July 12, 2023, 2:32am UTC](https://forums.unrealengine.com/t/warping-under-glass/1225660 "2023-07-12T02:32:42Z")
I’m working on a glass material for a watch but for some reason the watch face underneath the glass gets warped when viewing from different angles The watch face itself is just a flat texture. It looks warped under t… --- ## [Refraction samples per pixel on translucent material doesn't work](https://forums.unrealengine.com/t/refraction-samples-per-pixel-on-translucent-material-doesnt-work/465846)
**Author:** [@Altuan](https://forums.unrealengine.com/u/Altuan)\ **Replies:** 2\ **Last updated:** [April 24, 2023, 11:33pm UTC](https://forums.unrealengine.com/t/refraction-samples-per-pixel-on-translucent-material-doesnt-work/465846 "2023-04-24T23:33:00Z")
I have glass material. I need to see soft shadows in the refraction. And also a bit of roughness in the reflection. I use raytracing. The problem is that the material ignores my attempts to set samples to refraction. The… --- ## [Upside-down refraction without using ray tracing?](https://forums.unrealengine.com/t/upside-down-refraction-without-using-ray-tracing/760009)
**Author:** [@Kligan](https://forums.unrealengine.com/u/Kligan)\ **Replies:** 3\ **Last updated:** [January 30, 2023, 10:15pm UTC](https://forums.unrealengine.com/t/upside-down-refraction-without-using-ray-tracing/760009 "2023-01-30T22:15:46Z")
Is it possible? A glass sphere should refract things upside-down, like this: Simply inputting negative value into IOR doesn’t work. It looks like this: Is there a trick to make refraction upside-down without enab… --- ## [Building Optical Systems and Simulating Light Propagation](https://forums.unrealengine.com/t/building-optical-systems-and-simulating-light-propagation/589847)
**Author:** [@Sr.Ubadunga](https://forums.unrealengine.com/u/Sr.Ubadunga)\ **Replies:** 1\ **Last updated:** [January 26, 2023, 1:39am UTC](https://forums.unrealengine.com/t/building-optical-systems-and-simulating-light-propagation/589847 "2023-01-26T01:39:09Z")
Hello, I was looking through the Unreal Engine documentation and tutorials trying to find answers to my questions, but I couldn’t find any, hence I’m posting a question here. I was wondering what the Unreal Engine’s cap… --- ## [curtain opacity](https://forums.unrealengine.com/t/curtain-opacity/753400)
**Author:** [@filanek](https://forums.unrealengine.com/u/filanek)\ **Replies:** 3\ **Last updated:** [January 21, 2023, 4:29am UTC](https://forums.unrealengine.com/t/curtain-opacity/753400 "2023-01-21T04:29:25Z")
Hello, I have curtain and I want to see through a little bit, here are my different approaches, each of them has its problem. Is there any solution? -with opaque subsurface material is all ok,but I want to see through … --- ## [UE5 Refraction Problem](https://forums.unrealengine.com/t/ue5-refraction-problem/751958)
**Author:** [@ThisIsPoorAlex](https://forums.unrealengine.com/u/ThisIsPoorAlex)\ **Replies:** 1\ **Last updated:** [January 19, 2023, 4:00pm UTC](https://forums.unrealengine.com/t/ue5-refraction-problem/751958 "2023-01-19T16:00:19Z")
Hello, I am trying to setup my water materiall and got this artifact. The refraction works all over the mesh apart from the outline. The outline stays the same shape and the parts that would be changed are filled in co… --- ## [Glass Shader - Fullscreen Issue w/ Negative Refraction Values?](https://forums.unrealengine.com/t/glass-shader-fullscreen-issue-w-negative-refraction-values/733900)
**Author:** [@CaliCoastReplay](https://forums.unrealengine.com/u/CaliCoastReplay)\ **Replies:** 2\ **Last updated:** [December 28, 2022, 8:04pm UTC](https://forums.unrealengine.com/t/glass-shader-fullscreen-issue-w-negative-refraction-values/733900 "2022-12-28T20:04:22Z")
Hey all! I have a really nice third-person variation on the classic marble roller going, and have a really nice glass shader going along with it, based on this tutorial. I am having an issue with the refraction, howeve… --- ## [Orthographic. There is no reflection](https://forums.unrealengine.com/t/orthographic-there-is-no-reflection/481907)
**Author:** [@Tiyasin](https://forums.unrealengine.com/u/Tiyasin)\ **Replies:** 1\ **Last updated:** [April 18, 2022, 3:22pm UTC](https://forums.unrealengine.com/t/orthographic-there-is-no-reflection/481907 "2022-04-18T15:22:29Z")
if CameraMode is Orthographic. then There will be no refraction. How to realize refraction in Orthographic??? How to make a good effect? I don’t understand. Why doesn’t 2D support it? --- ## [How to fake refraction - what is the math?](https://forums.unrealengine.com/t/how-to-fake-refraction-what-is-the-math/497471)
**Author:** [@Frenetic](https://forums.unrealengine.com/u/Frenetic)\ **Replies:** 2\ **Last updated:** [February 15, 2022, 6:21am UTC](https://forums.unrealengine.com/t/how-to-fake-refraction-what-is-the-math/497471 "2022-02-15T06:21:37Z")
I did try searching on this, but most/all of the responses around refraction are tied to transparent materials. My case is a bit different as I want to know HOW to do it vs having problems WITH it… (refraction as a mate… --- ## [Refraction not affecting particle system (Niagara)](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693)
**Author:** [@Buchinchin](https://forums.unrealengine.com/u/Buchinchin)\ **Replies:** 2\ **Last updated:** [October 20, 2021, 9:30pm UTC](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693 "2021-10-20T21:30:20Z")
I’ve made a refraction material for my particle system and it works in the preview window but in-game the particles are unaffected. (picture is in-game, I put a mesh behind the particle system. The mesh is affected by th… --- ## [Reflections of Refracted Materials Issue](https://forums.unrealengine.com/t/reflections-of-refracted-materials-issue/487379)
**Author:** [@2Dios](https://forums.unrealengine.com/u/2Dios)\ **Replies:** 0\ **Last updated:** [August 13, 2021, 1:02am UTC](https://forums.unrealengine.com/t/reflections-of-refracted-materials-issue/487379 "2021-08-13T01:02:05Z")
I have these acrylic panels in my room, and normally they look pretty good. Unfortunately, there are a few issues that arise. First, they are different colors, and when seen at angles, they ‘pop’ in front of the others a… --- ## [Weird refraction issue](https://forums.unrealengine.com/t/weird-refraction-issue/481654)
**Author:** [@Ascedmor](https://forums.unrealengine.com/u/Ascedmor)\ **Replies:** 3\ **Last updated:** [April 11, 2021, 6:15am UTC](https://forums.unrealengine.com/t/weird-refraction-issue/481654 "2021-04-11T06:15:47Z")
Can anyone tell me why my translucent material is behaving like this? Here is a screenshot of my material setup, its pretty basic I’ve set Blend Mode to Translucent and changed Lighting Mode to Volumentric Direct… --- ## [Shaking / Jittering reflections](https://forums.unrealengine.com/t/shaking-jittering-reflections/479994)
**Author:** [@zabadoy](https://forums.unrealengine.com/u/zabadoy)\ **Replies:** 0\ **Last updated:** [March 9, 2021, 3:36pm UTC](https://forums.unrealengine.com/t/shaking-jittering-reflections/479994 "2021-03-09T15:36:54Z")
Hello, I have this test scene I made to try out high quality rendering with raytracing. I’m having the results I expect overall, but I’m getting very weird unstable reflections, that shake and jitter all over, as you ca… --- ## [Refraction problem in unreal engine 4.26](https://forums.unrealengine.com/t/refraction-problem-in-unreal-engine-4-26/479391)
**Author:** [@dante666](https://forums.unrealengine.com/u/dante666)\ **Replies:** 0\ **Last updated:** [February 25, 2021, 9:22am UTC](https://forums.unrealengine.com/t/refraction-problem-in-unreal-engine-4-26/479391 "2021-02-25T09:22:18Z")
Hello I’m new to using materials with unreal engine and I’m looking to learn. I followed the basic tutorial to make a glass material but I don’t get exactly the right result. Indeed when I change the Refraction paramete… --- ## [Refraction Raytracing translucency issue](https://forums.unrealengine.com/t/refraction-raytracing-translucency-issue/476326)
**Author:** [@Teammax](https://forums.unrealengine.com/u/Teammax)\ **Replies:** 1\ **Last updated:** [January 21, 2021, 4:31pm UTC](https://forums.unrealengine.com/t/refraction-raytracing-translucency-issue/476326 "2021-01-21T16:31:09Z")
I wanted to make a tulle for my project. Made this simple material (attached). but when i tryed to change parameter of refraction nothing happend. Tulle, no matter 0 or 1 in refraction param, still looks like glass. I se… --- ## [Bug: Refraction don't work from MaterialAttributes](https://forums.unrealengine.com/t/bug-refraction-dont-work-from-materialattributes/477193)
**Author:** [@Anonymous\_bb06bbffd50372e8e56b9fd864e30a78](https://forums.unrealengine.com/u/Anonymous_bb06bbffd50372e8e56b9fd864e30a78)\ **Replies:** 0\ **Last updated:** [January 13, 2021, 11:02am UTC](https://forums.unrealengine.com/t/bug-refraction-dont-work-from-materialattributes/477193 "2021-01-13T11:02:24Z")
Refraction node don’t work in SetMaterialAttributes. How to reproduce: Create material function MF Make node SetMaterialAttributes with refraction node (0.5 for example) Create translucent material with UseMaterialAtt… --- ## [Refraction(Opacity) not showing in reflective objects](https://forums.unrealengine.com/t/refraction-opacity-not-showing-in-reflective-objects/475794)
**Author:** [@RangeFilms](https://forums.unrealengine.com/u/RangeFilms)\ **Replies:** 0\ **Last updated:** [December 12, 2020, 12:10pm UTC](https://forums.unrealengine.com/t/refraction-opacity-not-showing-in-reflective-objects/475794 "2020-12-12T12:10:46Z")
Hello, I have an issue with ray traced refractions. I just realized that my high reflective objects in the scene are not calculating the opacity or refraction of my windows. I brought in some spheres to showcase it a bi… --- ## [Beam particle refraction not affecting the world](https://forums.unrealengine.com/t/beam-particle-refraction-not-affecting-the-world/387892)
**Author:** [@anonymous\_user\_81e622981](https://forums.unrealengine.com/u/anonymous_user_81e622981)\ **Replies:** 2\ **Last updated:** [November 28, 2020, 7:31pm UTC](https://forums.unrealengine.com/t/beam-particle-refraction-not-affecting-the-world/387892 "2020-11-28T19:31:11Z")
Hi, i have an easy material with some refraction in it. I want to have a beam particle using this material! Beam works just fine but the refraction does not do anything! It jsut seems that it is not there or so… What… --- ## [Translucency/Refraction issues with Glass RT shader in 4.25](https://forums.unrealengine.com/t/translucency-refraction-issues-with-glass-rt-shader-in-4-25/472254)
**Author:** [@stas3dart](https://forums.unrealengine.com/u/stas3dart)\ **Replies:** 3\ **Last updated:** [November 4, 2020, 8:18am UTC](https://forums.unrealengine.com/t/translucency-refraction-issues-with-glass-rt-shader-in-4-25/472254 "2020-11-04T08:18:35Z")
Hi everyone. I’m experimenting with UE4.25 at the moment. Trying to follow this webinar: Using the Automotive Materials pack along with the Automotive Beach Scene. I’m getting a fairly nice result, but do have an issue… --- ## [Why are my windows creating multiple reflections?](https://forums.unrealengine.com/t/why-are-my-windows-creating-multiple-reflections/469254)
**Author:** [@anonymous\_user\_4373a7c8](https://forums.unrealengine.com/u/anonymous_user_4373a7c8)\ **Replies:** 0\ **Last updated:** [August 5, 2020, 5:22pm UTC](https://forums.unrealengine.com/t/why-are-my-windows-creating-multiple-reflections/469254 "2020-08-05T17:22:00Z")
My windows, when viewed at an angle, have multiple reflections of themselves. They appear to be reflecting themselves and checking “Reverse Culling” did not solve the problem. I also have reflection capture spheres in th… --- ## [\[BUG\] refraction doesn't work if compile directly with material attributes](https://forums.unrealengine.com/t/bug-refraction-doesnt-work-if-compile-directly-with-material-attributes/466407)
**Author:** [@dextml](https://forums.unrealengine.com/u/dextml)\ **Replies:** 0\ **Last updated:** [June 8, 2020, 8:31am UTC](https://forums.unrealengine.com/t/bug-refraction-doesnt-work-if-compile-directly-with-material-attributes/466407 "2020-06-08T08:31:08Z")
Original bug: https://answers.unrealengine.com/questions/1046/bugrefraction-in-material-layer-doesnt-work-if-con.html As of 4.25.1, this bug still exists in a different form: To reproduce: create a material asset Ti… [Next page](https://forums.unrealengine.com/tag/refraction/333.md?match_all_tags=true&page=1&tags%5B%5D=refraction)