Add a non-normative note re: handling alpha-blend with no alpha channel.

immersive-web / webxr-ar-module

Repository for the WebXR Augmented Reality Module

https://immersive-web.github.io/webxr-ar-module

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Add a non-normative note re: handling alpha-blend with no alpha channel. #39

Closed toji closed 4 years ago

toji commented 4 years ago

/fixes #17. Just drops in a quick note that explains that using a layer without alpha with an alpha-blend device is valid, and may be an opportunity for optimization.