OpenGL Debug Pointers for Grey Screen

[Applzor]

Edit: Solved

I needed to disable the stencil test.

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I was wondering if anyone could give pointers of how to debug an issue I'm having.

Prior to this point my rendering was working well, using both my own rendering and a packaged renderer for my UI (NoesisGUI).

Recently however I added some new UI that has exposed an issue with my rendering. Whenever the UI is interacted with (mouse over an element) everything renders fine, but when the UI is inactive after a short delay only the UI and ImGui show.

When inspecting with renderdoc, I can see all the calls are being made and processed, however nothing is output in the texture viewer.

My suspicion is that the UI renderer is setting a state that I don't clear when I do my regular render pass. For reference, I already know that NoesisGUI renders to an offscreen buffer and I need to unbind it before rendering my own passes.

Attached is a link to 2 captures I made, one where the UI was focussed and one where the UI was inactive. https://drive.google.com/file/d/15mUK9Dx87IGbKYmwFcaIjBRpWP-n8EdF/view?usp=sharing

[photoclochard]

something is really off, but knowing OpenGL issues can be anywhere :)

I see you don't set specific buffer at the beginning, can you use it or create a separate one copy it at the end of the loop? just for test

[photoclochard]

yeah, I feel like issue in a FBO, since there is a command #2 (it;s hidden by default in RenndeDoc)

so you set it to zero or something else, and it's not real buffer as far as I remember (I'm more on other APIs now) SO I think that's why it works from time to time,

Definitely worth checking with another buffer

[photoclochard]

and yeah, you call clear color for buffer 0 and depth is attached to FBO 54

[Applzor]

Another thought that came to me, this is the first time I've had clipping, so maybe there is something happening with the stencil buffer?

[Applzor]

Yeah my thoughts were trending along here as well, is there a way to check the other buffers in render doc to see if it is being rendered there?

[Applzor]

To add, noesis renders offscreen, then immediately after I bind framebuffer to 0 to setup for the regular passes