Strange problem with mobile HDR

Hi, my game is working fine without Mobile HDR but if I try to activate it, I have this when I try to run the game in mobile preview or on a real mobile :

Of course this not one my textures (my game is lowpoly / flat shadding). The game is running because I can hear an enemy hitting my character. It looks like this texture is some kind of debug texture rendered on top of the actual scene when mobile HDR is on but what does it mean because there’s no error message?

I haven’t worked with mobile rendering but when I see this it usually means that the post process material failed to compile correctly, or is still compiling. If you’re playing your packaged game, then I would check to make sure your post process material is set up correctly. You’re right that the texture you see is some kind of debug texture, as I always see it on broken decals and post processing materials.

Thanks for your help. I don’t use any post process. There’s only a directional light with default settings, two characters and some mesh with very basic material (only a texture connected to the base color node and nothing else)
But thanks for confirming that this is a debug thing, now I need to find where the problem is and it’s not easy without any error output.