See this thread: https://forums.dolphin-emu.org/Thread-split-hack-to-fix-sparkle-issue-in-older-intel-gpus-in-d3d?highlight=intel+hd+4000
Intel's last (?) drivers for HD 4000 are incompatible with the way Dolphin calculates graphics, specifically NSMB shows these artifacts in question. I made some builds quite some time ago and I am not planning on updating them, but you should find a working build from the first post. It dates back to 2018 and Dolphin 5.0-7082 , but is very much playable and working for this game. There is also the source code if you want to dig into Visual Studio and build a more recent version yourself
Intel's last (?) drivers for HD 4000 are incompatible with the way Dolphin calculates graphics, specifically NSMB shows these artifacts in question. I made some builds quite some time ago and I am not planning on updating them, but you should find a working build from the first post. It dates back to 2018 and Dolphin 5.0-7082 , but is very much playable and working for this game. There is also the source code if you want to dig into Visual Studio and build a more recent version yourself