[Toolkit bug][HdRemix]: Unloading a stage does not free vram + issue when loading captures

Contact Details (Optional)

No response

Describe the bug

From the latest changelog:
Added the option to unload the stage to reclaim resources without closing the app. This function is useful if you need to free up memory to do certain actions (for example, boot the game while running RTX Remix, or run RTX Remix’s AI Texture Tools). This option can be found in the top left menu.

Unloading a stage does not free my gpu's vram so there is no chance to load up the game or think about any texture upscaling without closing the toolkit first.

Loading a capture with the stage unloaded results in the project failing to load / throwing an error message.

https://github.com/NVIDIAGameWorks/rtx-remix/assets/45299104/56308722-ff32-4095-ae24-5518eaae7f42

How do you reproduce the bug?

1. Unload a stage and watch vram usage
2. Load a capture after stage unloading

What is the expected behavior?

The toolkit should free gpu vram.
Loading a capture after unloading a stage should reload the stage.

Maybe throw the user into the homescreen when unloading a stage so that he has to re-load the project from there

Version

2024.3.0

Reproduce the two reported flows: unloading a stage while watching VRAM usage, then loading a capture with the stage unloaded. Trace the stage-unload and capture-loading entry points to determine why resources remain allocated and why loading fails. Done means unloading reclaims GPU VRAM and loading a capture reloads the stage or otherwise completes successfully.