MSAA help/example?

[Marlax0]

Setting sampleNum in nri::MultisampleDesc greater than 1 results in ForcedSampleCount being set in the corresponding D3D12_RASTERIZER_DESC.
ForcedSampleCount has some very restrictive limitations. Read all about them here.

How do I just enable "normal" multisampling for a nri::Pipeline?

To clarify, I just want to forward render my scene geometry using a depth buffer, with multisampling, like I am able to do using D3D12.

Sorry if I've greatly misunderstood something.

[dzhdanNV]

Hi. I quickly reviewed MSAA related code:

• yes, ForcedSampleCount is used incorrectly (sorry!)
• the good news is that to get MSAA working just comment out ForcedSampleCount lines (2 in D3D12 and 2 in D3D11)
• if there is an analog for ForcedSampleCount in VK, I will expose a separate optional setting
• I will add a basic sample to test MSAA + resolve functionality. Hopefully this week

Please, let me know if the quick fix doesn't work.

[dzhdanNV]

VK doesn't have ForcedSampleCount analog. I will commit a quick fix in a few minutes...

[dzhdanNV]

Committed the fix.

[Marlax0]

Hey I also don't see any way to create a MSAA swap chain, unless I've missed something.

[dzhdanNV]

Yes, expected. I would prefer to not add MSAA swapchains since it's a bad practice (and also it adds some usage restrictions).

[Marlax0]

True. I don't actually use one either, but it would have been a quick way to test.
I'll see if I can get a sample working soon.

Edit: I can confirm creating the nri::Pipeline with multisampling and depth/stencil now works as expected.
I haven't finished porting the rest of my renderer yet, so I can't fully test it. I don't think there will be any issues...

[dzhdanNV]

Thanks for testing! Hope it really works (it should) :)

[Marlax0]

It's gonna take me a bit longer than expected to fully test this.
I'm gonna go ahead and close this issue.