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unity issue tracker increased memory usage when update mode on demand realtime lights are used and dx12 api is selected unity issue tracker home about unity unity hub your privacy choices cookie settings copyright 2026 unity technologies back to issues fixed uum 90065 increased memory usage when update mode on demand realtime lights are used and dx12 api is selected unity directx12 statuses fixed 6 4 x 6000 4 0a4 6 3 x 6000 3 2f1 6 1 x 6000 1 0f1 onwards 6000 1 0f1 won t fix 6 5 x 6 2 x 6000 2 0a10 onwards 6 0 x 2022 3 x 2021 3 x resolution notes 6 5 x won t fix fix should already be in 6000 5 because it landed in 6000 4 fix should already be in 6000 5 because it landed in 6000 4 description reproduction steps 1 open the attached lights memory tests zip project 2 open the outdoorsscene 3 build and run the project 4 after the player is built open task manager 5 observe the memory usage of the player lightsmemory exe expected result the player uses around 600 mb of memory actual result the player uses around 1 3 gb of memory reproducible with 2021 3 46f1 2022 3 52f1 6000 0 30f1 6000 1 0a7 reproducible on windows 11 not reproducible on no other environment tested reproduces on both dx12 and vulkan notes pressing space on the keyboard calls requestshadowmaprendering on every light and pressing it a few times can increase the memory to up to 2 gb does not seem to affect dx11 builds as the memory there stays under 600 700 mb in 2021 3 the memory usage was 1 5 gb 2022 3 1 4 gb 6000 0 1 7 gb and 6000 1 1 7 gb the more cube gameobjects there are in the scene the higher the memory usage is prioritise and follow this issue vote 58 watch have a workaround or additional info about this issue join the conversation on unity discussions voted issues watched issues issues you vote on will appear here