# How do you set bCastDynamicShadow to False? **URL:** \ **Category:** Rendering\ **Tags:** dynamic-shadows, unreal-engine, question\ **Created:** [December 4, 2019, 6:35pm UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127 "2019-12-04T18:35:35Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![JIMMYMANGO69](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JIMMYMANGO69](https://forums.unrealengine.com/u/JIMMYMANGO69)\ **Post date:** [December 4, 2019, 6:35pm UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/1 "2019-12-04T18:35:35Z")
I have a warning saying my landscape needs to set bCastDynamicShadow to False or suffer a large performance hit. I am looking in the details section for dynamic shadow casting but I don’t see anything. Could someone tell me where this lives? and how to change this flag? thanks in advance. ---
**Author:** ![NextWorldVR](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NextWorldVR](https://forums.unrealengine.com/u/NextWorldVR)\ **Post date:** [March 31, 2021, 3:16am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/2 "2021-03-31T03:16:00Z")
here is what the manual says: bCastDynamicShadow Controls whether the primitive should cast shadows in the case of non precomputed shadowing. OH NOW I GET HOW TO USE AND CONTROL THAT FUNCTION AND WHERE TO CHANGE IT!! (JOKE.) THAT IS FOR ALL THE TRIMES PEOPLE SAID R.T.F.M. ABOUT UE4! USELESS. ---
**Author:** ![NextWorldVR](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NextWorldVR](https://forums.unrealengine.com/u/NextWorldVR)\ **Post date:** [March 31, 2021, 3:25am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/3 "2021-03-31T03:25:49Z")
AS USUAL I FOUND IT MYSELF. I will put it here (and there) so people can see) ` I went into the Blueprint where the Mesh is used, and found Dynamic Shadows (and Static and CINMEMATIC! ) I unchecked Dynamic. I think that is what it meant by the error. ![334176-unti7d-1.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/f/d/bfdc3a598ab275ee668829527a8805ec790c6beb.jpeg) ---
**Author:** ![LadyKairi15](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ladykairi15/32/607868_2.png) [@LadyKairi15](https://forums.unrealengine.com/u/LadyKairi15)\ **Post date:** [March 14, 2023, 1:21am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/4 "2023-03-14T01:21:04Z")
I know this is 2 yrs old but thank you for posting your find! I just had this error! ---
**Author:** ![Fonni99](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Fonni99](https://forums.unrealengine.com/u/Fonni99)\ **Post date:** [July 10, 2023, 3:22pm UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/5 "2023-07-10T15:22:36Z")
> [@NextWorldVR](#): > > AS USUAL I FOUND IT MYSELF. I will put it here (and there) so people can see) ` I went into the Blueprint where the Mesh is used, and found Dynamic Shadows (and Static and CINMEMATIC! ) I unchecked Dynamic. I think that is what it meant by the error. > > ![334176-unti7d-1.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/f/d/bfdc3a598ab275ee668829527a8805ec790c6beb.jpeg) Thank you very much ^-^ ---
**Author:** ![Reahreic](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/reahreic/32/911691_2.png) [@Reahreic](https://forums.unrealengine.com/u/Reahreic)\ **Post date:** [July 9, 2024, 11:33am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/6 "2024-07-09T11:33:48Z")
In UE 5.3 I get this warning for a large mesh that has both static and dynamic shadows turned off. Not sure what else I’m supposed to do… ---
**Author:** ![R0NlN1028](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/r0nln1028/32/1219240_2.png) [@R0NlN1028](https://forums.unrealengine.com/u/R0NlN1028)\ **Post date:** [November 2, 2024, 2:07am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/7 "2024-11-02T02:07:01Z")
I know it can be hard on here sometimes to get help but glad you figured it out. How something so small cause a big hit like this is crazy. ---
**Author:** ![Cavewerk](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Cavewerk](https://forums.unrealengine.com/u/Cavewerk)\ **Post date:** [January 4, 2025, 10:03pm UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/8 "2025-01-04T22:03:30Z")
Thank you @NextWorldVR We don’t deserve you. ---
**Author:** ![anruidoragon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anruidoragon](https://forums.unrealengine.com/u/anruidoragon)\ **Post date:** [May 15, 2025, 1:01am UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/9 "2025-05-15T01:01:26Z")
That “Dynamic Shadow” option is also found when you select the “Add Instanced Static Mesh Component” node. ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/9/5/995178f03cdfd8014b689c0205e5c160b40e0d00.png) ---
**Author:** ![Buennyo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Buennyo](https://forums.unrealengine.com/u/Buennyo)\ **Post date:** [June 9, 2025, 8:07pm UTC](https://forums.unrealengine.com/t/how-do-you-set-bcastdynamicshadow-to-false/459127/10 "2025-06-09T20:07:27Z")
Thank you so much! I could’nt find it! I have it now thanks to you! \<3