This is due to Dolphin hitting a slow path on those graphics cards. They get dramatically slower as the internal resolution increase, even though comparable AMD graphics cards suffer no slowdown at all.
NVIDIA cards are abnormally slow during Bounding Box effects even at very low internal resolutions when using D3D11. This does not occur on OpenGL or Vulkan, so use them to avoid this issue. When using the D3D backend, asking Merluvee to tell you the next path may freeze the game. Turn off the dual core setting to avoid this issue. If the PAL version of the game has been set to run at 60 Hz, it may change back to 50Hz under some circumstances. The defect is very hard to see on console (it's right above the rock in the image below) due to the low resolution and analog quality loss, but the higher internal resolution and custom HD textures allowed by Dolphin make it very obvious. This is not a bug in Dolphin, but a defect inherent to the way the effect is achieved, as it appears on console too.
The sunset effect in Riverside Station has a defect where non-static objects in front of it have a trail of ghosts coming off. In this case, updating drivers or using a different video backend may be your only recourse. Please note that other driver issues can often cause issues with Bounding Box emulation, which can produce similar bugs to having no Bounding Box support whatsoever. On Android, 5.0-9322 or newer is required for Bounding Box to function at all due to an unrelated bug. If Bounding Box is not emulated correctly, the game will show severe graphical glitches and won't be playable to finish.īecause Dolphin has gone through many variants of Bounding Box support throughout its history, it may be possible for older graphics cards to use less accurate versions of Bounding Box present in older builds.
On macOS, MoltenVK can be used to attain Vulkan support on the latest builds. This requires a NVIDIA GeForce 400 series or newer, a AMD/ATI Radeon HD 5000 series or newer, or a Intel Broadwell Integrated GPU (Intel HD 5300+) or newer and an operating system that supports OpenGL 4.3, D3D11, GLES 3.1, or Vulkan. This game uses a feature known as "Bounding Box", which Dolphin typically uses Shader Storage Buffer Objects (SSBO) to emulate.
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