# Virtual Shadow Map Blocky Flickering UE 5.3.2 **URL:** \ **Category:** Cinematics & Media\ **Tags:** shadows-problem, unreal-engine, Lumen, Rendering, question\ **Created:** [June 17, 2025, 6:45pm UTC](https://forums.unrealengine.com/t/virtual-shadow-map-blocky-flickering-ue-5-3-2/2562800 "2025-06-17T18:45:25Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![brs-sebascova](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/brs-sebascova/32/1052483_2.png) [@brs-sebascova](https://forums.unrealengine.com/u/brs-sebascova)\ **Post date:** [June 17, 2025, 8:48pm UTC](https://forums.unrealengine.com/t/virtual-shadow-map-blocky-flickering-ue-5-3-2/2562800/2 "2025-06-17T20:48:25Z")
Hello there @olegwer1! Checking through the community for similar scenarios, there are a few parameter changes to test around. From your light’s source details’ panel, adjust the following: - **Shadow Map Channel** : set to 0 - **Shadow Map Resolution Scale** : switch between 2.0 to 4.0 - **Virtual Shadow Map Bias** : go from 0.01 to 0.1 - **Normal Bias** : switch between 0.2 to 0.3 - **Dynamic Shadow Distance Movable Light** : increase to 20000 - Also, it is always useful to update UE to the latest, stable version (these days, either 5.5.4 or 5.6.0 will do the trick), as well as setting your video drivers to the developer version. - Finally, check the thread and documentation below for more methods to test: > [@Improving Virtual Shadow Map Distance/Quality](https://forums.unrealengine.com/t/improving-virtual-shadow-map-distance-quality/625163): > > Hello all. With virtual shadow maps, I’m having trouble getting detailed shadows to stay visible as I move the camera further from mesh geometry. This is just with a single directional light, movable. As this picture tries to show, moving a slight distance forward towards this mesh results in a much more dark and detailed shadow appearing under the bricks. That’s working as intended, I understand, as part of the clip map system. However, I’m just a little confused as to how close yo… > **[Virtual Shadow Maps in Unreal Engine | Unreal Engine 5.6 Documentation |...](https://dev.epicgames.com/documentation/en-us/unreal-engine/virtual-shadow-maps-in-unreal-engine)** > > Learn about the high-resolution shadow techniques designed with film-quality assets and large dynamically lit open worlds in mind in Unreal Engine. --- _[View the full topic](https://forums.unrealengine.com/t/virtual-shadow-map-blocky-flickering-ue-5-3-2/2562800)._