Mario Galaxy: Random black artifacts

[bonzobv]

I finally seem to have found an ideal Mario Galaxy setup... with a small issue. For whatever reason, all of the rooms that you use to get to the galaxies (i.e. Terrace, Kitchen, etc.) turn black when I walk inside of them (except on a rare occasion where they'll display correctly... by rare I mean it happened once.) Also, on Beach Bowl galaxy, ALL effects have turned into black boxes (such as Mario's spin, the water effects, the star bits.) What could be causing this?

My Settings: DX9, scaling enabled, 3xIR, 1xAF, all hacks on the bottom on except disabling alpha, EFB to RAM with caching checked.

The other backends run noticeably slower. DX9 seems to be the only back end I can get full speed 1080p in with my relatively humble setup.

What could the issue potentially be? I'm really enjoying getting to know the ins and outs of this emulator.

Thank you in advance!

P.S. (I could not find ANYTHING about a similar issue anywhere, not on Google nor the forum. If a thread already exists about this and I overlooked it, I'm very sorry.)

[Shonumi]

Try using builds from 4.0 or above first. When you configure Dolphin, try to use as few of those hacks you mentioned as possible. Lastly, could you post a screenshot of the issue? Do OpenGL and D3D11 work properly, or are they broken as well? You only mentioned that they are running slow, so I figured I'd ask.

[pauldacheez]

OpenGL on a current build (preferably 4.0 or later) with Vertex Streaming Hack checked (and no other hacks on the bottom) will likely be faster than DX9 on your GPU.

[bonzobv]

They went away when I played today :O my only issue now is the occasional moment where the game will sort of pause and loop whatever just happened very quickly. It doesn't happen too often as to make the game unplayable, but enough that it's annoying :\

Now, why is it that OpenGL with vertex streaming hack simply won't run as lightning fast as DX9? It would seem that with my GPU it would, but it just won't.

Does audio backend have anything to do with it? Is there a certain backend that seems to work better on SMG?

Thank you for the replies

Edit: if it happens again, I'll post a screencap.