Appears to block game thread / cause sync issues between game and render thread on 5.4.3

[cssoftware-main]

Both when I use this plugin, as well as implement the technique directly from blog post: https://nicholas477.github.io/blog/2023/reading-rt/

I get FrameSyncTime that appears to be a flush of the gpu, the same as when you call RenderTarget->ReadPixels()

[nicholas477]

let me test this out

[cssoftware-main]

Additional research indicates that it probably isn't a full flush. But appears to be hitting the game/render thread sync mechanism intended to prevent the game and render thread from getting too far out of sync.

[nicholas477]

Where's it hitting that in the plugin code?

[nicholas477]

I'm not sure if the RHI matters but I tested it out in 5.4.3 on dx12 and I don't see it flushing at all