# HDRI backdrop in mobile VR **URL:** \ **Category:** XR Development\ **Tags:** hdri, vulkan, oculus-quest, unreal-engine, question\ **Created:** [July 13, 2023, 11:45am UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004 "2023-07-13T11:45:14Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![RealityWebTeam](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/realitywebteam/32/719069_2.png) [@RealityWebTeam](https://forums.unrealengine.com/u/RealityWebTeam)\ **Post date:** [July 13, 2023, 11:45am UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/1 "2023-07-13T11:45:14Z")
Can hdri backdrops be used in mobile VR (android using vulkan)? I develop a game for oculus quest 2 with this setup and when testing the game using the link (not mobile) the backdrop works but when testing the build it doesn’t. The thing is that I can see the backdrop when looking down but in the place of the envirodome mesh I see just a grayish wall. There’s no other sky or light element in my scene. ---
**Author:** ![RealityWebTeam](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/realitywebteam/32/719069_2.png) [@RealityWebTeam](https://forums.unrealengine.com/u/RealityWebTeam)\ **Post date:** [July 13, 2023, 1:59pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/2 "2023-07-13T13:59:20Z")
Edit: it works when I reach near the edge of it’s mesh ---
**Author:** ![MarcusPaulista](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/marcuspaulista/32/634923_2.png) [@MarcusPaulista](https://forums.unrealengine.com/u/MarcusPaulista)\ **Post date:** [October 11, 2023, 12:55am UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/3 "2023-10-11T00:55:26Z")
Hi @RealityWebTeam. I’m having the same problem. Can you be more specific on how you solved it? Thanks a lot! ---
**Author:** ![quentin1771](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@quentin1771](https://forums.unrealengine.com/u/quentin1771)\ **Post date:** [October 27, 2023, 3:16pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/4 "2023-10-27T15:16:44Z")
In our case we were able to fix it by setting Engine–\>Rendering–\>Mobile–\>Mobile Float Precision Mode to “Use Full-precision for MaterialExpressions only” ---
**Author:** ![iBrews](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ibrews/32/1069219_2.png) [@iBrews](https://forums.unrealengine.com/u/iBrews)\ **Post date:** [January 28, 2024, 11:08pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/5 "2024-01-28T23:08:31Z")
thank you!! very helpful. ---
**Author:** ![RealityWebTeam](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/realitywebteam/32/719069_2.png) [@RealityWebTeam](https://forums.unrealengine.com/u/RealityWebTeam)\ **Post date:** [March 5, 2024, 2:40pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/6 "2024-03-05T14:40:55Z")
In our case we just found out that HDRI backdrops are not meant to be used in mobile VR at least for the time being. As an alternative you can create a giant mesh (like a dome sphere) and apply a material that will appear on the inside with your image. But I didn’t try the solutions from the guys bellow. ---
**Author:** ![PratyushKiran](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@PratyushKiran](https://forums.unrealengine.com/u/PratyushKiran)\ **Post date:** [September 23, 2024, 4:37pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/7 "2024-09-23T16:37:08Z")
Yes, the HDRIDrop plugin doesn’t work for Android VR development (5.3.2). You can do this instead - 1. Create a large sphere in your favorite modelling tool (in my case Blender) 2. Flip its normal 3. Download any HDRI of your liking (in EXR format) 4. make a Material of the HDRI texture, in which the texture sample is connected to emission node 5. assign the material to the imported sphere Tada ! Here is the work around. ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [October 23, 2024, 4:37pm UTC](https://forums.unrealengine.com/t/hdri-backdrop-in-mobile-vr/1228004/8 "2024-10-23T16:37:29Z")
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