Probe "Disco" Error

[reepblue]

Getting this issue when generating probes in areas like this.

Project sent in DM's as it has to do with the materials being used.

[Josh]

Hmmm, if I delete the other probe the problem goes away...

[reepblue]

I tried that and it didn't work on my end! 😱

[Josh]

It seems to be caused by this model, I think...

[Josh]

Yeah, it looks like that object is emitting some very bright colors for some reason. That's the source of all the bright pixels...

[Josh]

Okay, I think I see what is happening.

The material for the glass has metalness set to 100%, which means it only reflects the environment map or probes. But before the probes are rendered, there is nothing to reflect. Maybe it is a math error or maybe it is reflecting the contents of the cubemaps before anything is rendered, and they just contain random bytes.

I will look more closely at the shader code now, but that is basically what is going on, and the quick fix is to set metalness to 99.

[Josh]

I added a clamp in the lineartosrgb shader functions to make sure the color values are never less than zero, and now it is fine.