What is an issue?
DXRenderTarget m_renderTarget must be handled in DXRenderManager, not inside DXPostProcessContext UpdateScalePreset function.
Expected Causes
It is because DXRenderTarget m_renderTarget belongs to DXRenderManager, not DXPostProcessContext.
Expected Solutions
Somehow need to utilize DXRenderManager's UpdateScalePreset override function and QueueDeferredFunction function.