# GPU lightmass doesn't cast shadow (stationary light, static geometry)

**URL:** <https://forums.unrealengine.com/t/gpu-lightmass-doesnt-cast-shadow-stationary-light-static-geometry/1221447>\
**Category:** Rendering\
**Tags:** Shadows, gpu-lightmass, unreal-engine, question\
**Created:** [July 6, 2023, 4:40pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-doesnt-cast-shadow-stationary-light-static-geometry/1221447 "2023-07-06T16:40:07Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![Kettenotter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/kettenotter/32/620822_2.png) [@Kettenotter](https://forums.unrealengine.com/u/Kettenotter)\
**Post date:** [February 2, 2024, 11:15am UTC](https://forums.unrealengine.com/t/gpu-lightmass-doesnt-cast-shadow-stationary-light-static-geometry/1221447/13 "2024-02-02T11:15:21Z")

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Look into the solution above:  
@LEIT @ProletarianX @PabloNajurieta @kolja_k1 @Henri_arforia @brianegreen

Edit:  
Another solution which might work:

> [@Epic's GPUlightmass](https://forums.unrealengine.com/t/epics-gpulightmass/139357/555):
>
> So, it’s a witchcraft… GPULM has its own mind I guess. Changed nothing, except I ticked on SM6 for DX12 and Vulcan RHIs. Got all the shadows now building. Not complaining, but…

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