Armindesk

A couple of things to check here: First, make sure your MAME build actually includes BGFX support (some builds or older versions don’t fully expose all chains properly). Also double-check that the bgfx_path is pointing to the correct folder structure and that the shader files exist there. Another common issue is the backend—try switching bgfx_backend from Vulkan to Direct3D or OpenGL just to test if Vulkan is the problem on your setup. Lastly, verify the crt-geom-deluxe chain is actually available in your bgfx/chains directory. If MAME can’t find it, it silently falls back, which can look like “nothing is working”. If everything looks correct, testing with a default chain like default can help isolate whether it’s a config issue or missing shader files.

From the settings I’ve tested, shader cache and resolution scaling made the biggest difference for me. Shader cache reduced stutter a lot in heavier scenes, and dropping resolution scaling slightly gave a big FPS boost without losing too much visual quality. GPU accuracy tweaks helped too, but mostly in terms of stability rather than raw FPS. What about others here—any setting that surprised you?