Can I pull input from a file to affect a shader?

I would really like to create some communication between reshade and what is actually happening in the game.

Currently playing Oblivion Remastered, and getting comfortable using the lua scripting. 

I can now get the time of day, and write that to a file, and it would be great if I could have Reshade ingest that file and adjust parameters to my liking.

That way, I can have different effects for day and night, interior vs exterior, etc.

Can it be done? Can I have a script write to a file, and then have reshade read it and adjust effect parameters dynamically?

You can do all that and more with the ReShade add-on API: reshade.me/docs

So would create an add-on (effectively just a DLL) with the basic template from above documentation (DllMain + registering an event with ReShade). It does assume some very basic knowledge of C++ though (so far as to be able to create a DLL project in e.g. Visual Studio and add the ReShade API header files from github.com/crosire/reshade/tree/main/include ). In your case then probably want to register a callback for the "reshade::addon_event::reshade_begin_effects" event, as that is called right before rendering effects each frame and a good place to update uniform variables etc. Then can use the "reshade::api::effect_runtime" instance passed to the callback to look up uniform variables in your effect ( crosire.github.io/reshade-docs/structres...d32d1d3d4864dacef6e7 ) and update their values ( crosire.github.io/reshade-docs/structres...94e4289d30605a5c9742 ).

Thank you for your reply! I shall begin going down this rabbit hole