Running a 3DS Emulator Smoothly on an Android Smartphone: Recommended Settings Guide

As part of my plan to play through all the older Monster Hunter games, I finally made it to 3G. Since it's on the 3DS, it's quite demanding, making it tough to run on an older Android smartphone like the XPERIA XZ. After upgrading to the XPERIA 5 II and then the XPERIA 5 IV, it seemed much more feasible. Still, whenever I tested it, it felt slightly too laggy to be practical—until I tweaked the settings, and now it runs perfectly! You don't even need a PC with a dedicated graphics card!

Before I knew it, the emulator app had changed from Citra to Azahar. Apparently, that was due to circumstances like taking a step back following a lawsuit with Nintendo. Ah, by the way, I own the original game software myself before emulating! With Azahar, a lot of configuration options have been removed, which is a bit inconvenient, but one new image processing setting was added, and it turned out to be extremely effective.

There are three key points: 1. Select "Vulkan" for the Graphics API. 2. Delay render thread: 8000 μs (adjust based on your device specs; a setting introduced in Azahar). 3. Turn off 3D in the game's own OPTION menu!

1. Select "Vulkan" as the Graphics API

Before launching the game, open the settings menu by tapping the "..." button.
Go to "..." → "Settings" → "Graphics" → "Graphics API". You will see "OpenGLES" (selected by default) and "Vulkan", so select "Vulkan".
This is essential. This setting was also available in Citra.

[Asking Google AI about Vulkan]
Vulkan is:A low-overhead 3D graphics and compute API developed by the Khronos Group to efficiently control GPUs (Graphics Processing Units) with high performance across a wide range of platforms, including PCs and mobile devices.Compared to traditionalOpenGL,it allows direct control closer to the hardware level, significantly reducing CPU overhead while enabling higher frame rates and visual quality. It is used in high-demand applications such as game development and is supported on Android 7.0 (API level 24) and later.

2. Enter a value for "Delay Render Thread"

Similarly, this menu option can be found toward the bottom of the Graphics settings.

You can enter values from 0 to 16,000 μs, depending on your phone's specs and resolution.

I set mine to 3x resolution (1200x720) at 60 fps... after all, emulating isn't worth it unless you push for high specs like this. My hardware is an XPERIA 5 IV (Snapdragon 8 Gen 1), and setting it around 8000 μs worked fine. It runs almost flawlessly, though things got a bit demanding when facing two giant bosses at once.

Delaying the render thread lightens the load. If you don't delay it, it probably overlaps with other processing tasks and puts a strain on the system.

The 16,000 μs cap makes sense because 60 fps = 1/60 = 0.01666 seconds. Going higher than that would introduce a delay of more than a full frame. I experimented while assuming that if you set it too close to the limit, rendering won't finish in time before the next render pass starts. However, I have no idea whether this theory is actually correct—it's just a hunch!

Even after all this, the graphics might still look somewhat dull and dirty. That brings us to the third point! In the game's internal settings—for example, entering OPTION from the title screen of Monster Hunter 3G—turn OFF the 3DS-specific "3D Display". This is crucial and easy to forget. You likely need to configure this individually for each game.

Enjoy the game with clean, crisp visuals!

Look how gorgeous it looks, running buttery smooth and snappy.

3. Rendering for 3G's unique underwater combat works effortlessly. The aquatic monsters look so cool in the water! In other games where you only fight them on land, they feel kind of clumsy, but underwater they look amazing. You can't even catch up when they swim away to change areas. Now I get how Tanjiro felt screaming at Akaza as he ran away: "Don't run away! We're fighting in the water where you have the advantage!"

Ceadeus (the sea-angel-like boss) from the village story is so cool. A true demon. I wonder if it would just be slimy and helpless if it ever dragged itself onto land.

Once I reached High Rank, I finally met Zinogre. It made its debut in Monster Hunter Portable 3rd—the first MH game I ever played—so both the monster and its theme music are personal favorites.

Look at that morning sky—it's so beautiful. A Nintendo Switch port would look amazing, wouldn't it? I really hope they release 3G and 4G. Also, for Switch 2, I hope they bump up the specs to support 4K resolution—including for the current series games!