Simple UI/UMG only game uses a lot of GPU and is slow on Intel GPU
I'm creating a simple UI/UMG only game, with some control elements, a background image with a material set as brush and an image with a material set as brush, on which you can draw onto with your mouse.
It uses up to 25% of my GTX 1060 and it's incredible laggy on Intel GPU's like Intel Iris 6100 or the Intel HD 4000, even if you are not drawing and just dragging the window around your screen. It runs fine on comparable AMD APU's.
Any advice why it uses so much GPU and is so slow on Intel GPU's?
I've managed to cut down the GPU usage to 1/5th of it, by disabling all unused Post Processing Effects.
First I've added the following lines to the DefaultEngine.ini:
As a second step I've added a Post Processing Volume to every map and disabled anything with amount or intensity, which got me an addtional decrease in GPU usage.
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