HL2 Best Practices

[maluoi]

There's still some remaining recommendations for OpenXR performance I haven't gotten to for StereoKit. Don't need to get them all in for 0.1, just need to review and snag the low hanging fruit for now.

Recommendations are all here:
https://github.com/microsoft/OpenXR-SDK-VisualStudio#understand-openxr-samples-and-best-practices-for-hololens-2

• Rendertarget color format
• Texture array rendertarget
• Unbound reference space
• MRC alpha blend

[thetuvix]

Heads up that we just refined the recommendations there, including fixing up the recommended pixel format to be DXGI_FORMAT_B8G8R8A8_UNORM_SRGB, which is more optimal for performance on HoloLens 2 than linear formats. (avoids a render pass) Be sure you've got a gamma-correct render pipeline as you switch from linear to _SRGB here.

[maluoi]

Thanks for the heads up! :)

[maluoi]

Moving last remaining item, depth sharing, to v0.2:
#38