The new faster shader compilation method that comes with 5.4 update is great, I am sure. Of course, I can’t try it with my project, which uses DX12 and Lumen, and can’t know for certain as it seems to be incompatible with them. I tried updating to 5.4 from 5.3 several times, at least once with every minor update, but it just doesn’t seem to work. I really want to try it, and use the nee animation features. Neither 5.4.1 nor 5.4.2 solved this issue. I even tried creating a new project, and migrate to it (to 5.4.2) but the issue persists. Either on application startup or begin play, I get “Shader compilation failures are fatal.” I definitely don’t want to change my rendering settings. If anyone knows a workaround to get DX12 and Lumen working with 5.4, please let me know. Otherwise, Epic has got to fix this issue so we DX12 users can update to 5.4.