SSAO bug with mirrored objects

Bugs
1

Hi, currently SSAO does not handle mirrored objects (negative scaling) correctly. You can see it here:
https://www.babylonjs-playground.com/#ZKC9KH
Is it possible to fix this? Our data model makes heavy use of morroring and currently we can’t use SSAO.

2

pinging @CraigFeldspar who is currently working on our ssao2 implementation

3

It seems like this bug has been fixed by my last PR on SSAO.

When you force the old geometry buffer method (true to the last constructor parameter) :

        var tSSAO = new BABYLON.SSAO2RenderingPipeline("ssao", scene, {
                ssaoRatio: 0.5,
                blurRatio: 1.0,
            }, [camera], true);

we can indeed see the bug with the second cube.

Just use the latest version of babylon.js and you should be fine :slight_smile:

1 Like
4

Thank you that works but the new method seems to have a bug with the background color.
The color is brighter now.
Compare these two links please:
https://www.babylonjs-playground.com/#ZKC9KH
https://www.babylonjs-playground.com/#ZKC9KH#1

5

@CraigFeldspar Did you had time to look at the background color issue?

6

Hi @Kesshi,
It seems it comes from the fact we use a post process to apply gamma color transform with this new ssao method.
Fixing should be kinda easy though.
In the meantime, you can apply a quick and dirty fix : apply gamma to linear space transformation to your background color : scene.clearColor = scene.clearColor.toLinearSpace();

Hope this helps,