CODEWITHSUNDEEP
objective-cmetalantialiasingmultisampling
Adam B.
Adam B.

Reputation: 91

Metal multisampling results in darkened textures

So I'm trying to implement full-screen MSAA in my Metal app. I have it working and when drawing solid-filled polygons the edges appear smooth as expected. However, my textured polygons appear dark, and get darker as I increase the number of samples, indicating that the shader might be taking only one sample of the texture per fragment and blending it with n - 1 samples of black therefore making it darker.

However, in my app I also have textures that I render to and then draw to the screen. These textures show up perfectly fine. I can't really see a difference between the two kinds of textures that would change the behavior of multisampling.

Anyway, if anyone could maybe give me any clues as to what's going on, I would greatly appreciate it. I'm pretty stumped on this one.

EDIT:

Here is how I am setting up all my pipeline state(s)

Here is how the texture pipeline state is set up specifically

Upvotes: 1

Views: 219

Answers (1)

Adam B.
Adam B.

Reputation: 91

I figured it out. The problem was that I hadn't set my stencil draw pipeline state to be multisampled. Therefore it was only reading the value in the stencil buffer for 1 out of n samples and hence darkening the output. Works fine now.

Upvotes: 1

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