solved PBRSpecularGlossy and ReflectionProbe

[SvenFrankson]

Hi everyone,

 

I'm facing some issues with the use of ReflectionProbe, may I please request some help ? 

Here's the use case :

Some object is in a room with walls and windows, and I'd like the walls and windows to reflect on the objet.

So I add a probe at the object's position, push the walls and windows in the probe renderList.

And it works pretty well !

(here, the cube is the object, the balls are the walls and windows...)

https://www.babylonjs-playground.com/#AZA2CG#1

 

But in some cases (like in the linked playground), there's some long and synchronous computation when it needs to call ConvertCubeMapTextureToSphericalPolynomial. I think it's correlated to the type of the Material I'm applying the probe texture on...

Is there a workaround to avoid this computation ? (beside reducing the texture size ?).

On a side note, I have very little knowledge about the concepts of light harmonics, but why does this computation only happens once if the probe is updated each frame ?

In advance, thanks a lot for your inputs ! Have a nice day,

[GameMonetize]

ping @Sebavan

[Sebavan]

Actually I did it only once cause it is a slow operation :-)

You could force by forcing it to null before rendering but you would kill your fps.

To not compute it, I guess you could add one empty on your texture manually as it is normally lazily created: https://www.babylonjs-playground.com/#AZA2CG#2

[SvenFrankson]

Thanks Sebavan, I'll try it, seems like it could do the trick for us

I think my side question was "What does this computation do ?" ? It's about extracting light information from the texture ?

[Sebavan]

This is basically the diffuse part of the environment lighting where the reflection itself could be thought as the specular:

https://graphics.stanford.edu/papers/ravir_thesis/chapter4.pdf

This what you would see on a fully rough none reflective material:

http://playground.babylonjs.com/#19PJCY#1

[GameMonetize]

Please note how @Sebavan teased the new scene.createDefaultEnvironment feature

[SvenFrankson]

I just tried to assign an empty one to the texture, the differences are pretty small (the objets are quite small and glossy) and there's no freeze during scene load. I guess my problem's solved, thanks !