Rendering noise on Quest

Tubeliar

I have a very simple scene with some placeholder objects with basic materials. I export it to my Oculus Quest 1 and it works, but there is a weird noise in the image. The noise is different every frame, so not like a defective texture but more like tv-static.

In the attached image the bottom half looks as it should, as does the skybox in the upper right. The upper left is supposed to be one surface and should be the exact same color all over. Not only does is show the noise but there are even seams in the noise! They look warped in the screenshot but they're straight on the quest. Probably that's a visible artifact of the tiled rendering. The noise seems to be worse in peripheral areas and less in the center of view. To top it off, some surfaces in the scene (same object instance, same material) are completely unaffected.

Is this a bug or did i enable some conflicting rendering options?

Tubeliar

Somehow the screenshot didn't get attached in the original post, so here it is:

Megalomaniak

This noise could possibly be erroneous results from the depth or normal buffer. I'm not certain and can't confirm since I have no headset, but it could well be a bug.

TwistedTwigleg

Do you have shadows enabled in your scene? Maybe its shadow banding. Do you see this issue in the Godot editor at all, or is it just the headset?

Tubeliar

I don't have shadows enabled so i don't think it's shadow banding. The issue isn't visible in the editor or desktop builds, just in the headset. I've got rendering set to GLES2. It's weird that it does seem to affect certain mesh instances more than others, even though the scene is just copies of the same mesh. I'll add more images or a video later but this is what it's supposed to look like:

Tubeliar

I've made a video. The compression makes the noise look smoother than it is but you can see how different areas are affected differently. And the tiles show up very well too. Again none of the noise is supposed to be there (see the image from the post above). This is a very basic prototype so i changed almost no settings from a default empty scene. <iframe width="560" height="315" src="https://www.youtube.com/embed/LlzcAJu3AGU" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Megalomaniak

Hmm, additional thing to note is that godots renderer is tiled and there's clearly some incoherency in that noise between the tiles. I do think this looks like a bug and is probably worth reporting.

Tubeliar

Thanks. I filed https://github.com/godotengine/godot/issues/44546

Megalomaniak

Cheers, got immediately confirmed and in fact turns out it was already reported by another.