The phrase "Monster Hunter 3 Ultimate Cemu hot" usually refers to two things: how good the game looks when upscaled, and how hard it pushes your CPU.
Official Wii U servers are offline. Players are currently using the Azahar tool or Citra/Lime (3DS) to emulate local lobbies for online play.
By switching to Vulkan, capping your frame rate at 60 FPS, and enabling asynchronous shader compilation, you will drastically reduce the thermal load on your PC. You can enjoy hunting underwater monsters in Monster Hunter 3 Ultimate without worrying about your hardware overheating. If you are still experiencing thermal issues, let me know: What are you currently using? What temperatures (in °C) are your components reaching?
A major issue players face with MH3U on Cemu is the "hot" or oversaturated visual bug. The game often renders with blinding brightness levels, making volcanic regions completely unreadable. Using Community Graphic Packs
Are you having like stuttering or a black screen, or
Ensure you have the "Resolution" and "Shadow Quality" packs enabled to prevent visual glitches. Shader Cache: