New Api:
- Renderer::renderStandaloneView() is a new method that can be used
outside of beginFrame/endFrame on Views that have a RenderTarget
associated. This can be used as a poor man's compute API.
Improvements to Renderer:
- more aggressively skip lighting/shadowing code that won't be
needed by the current view
- Allow up to 64 KiB to be allocated from the render stream, up from
1 KiB
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