Add ability to change render target

[adamplayer]

Some games might use a different render target besides the hardcoded one here

// We only look at RT 0 currently. const uint32_t kRenderTargetIndex = 0;

Could this be either an option set in the rtx.conf file or even added to the imgui interface?

[anchorlightforge]

I've added an imgui option for testing on my own fork: https://github.com/anchorlightforge/dxvk-remix/releases/tag/RenderTargetImgui

For titles that use multiple render targets this won't be enough to fix the issue unfortunately.

[NV-DM]

This is tracked by REMIX-1205