CreateScreenshot and PostProcess return image black

[Dad72]

When adding a postProcess to the camera, the ScreenShot is black output. I remove prostProcess, the image is ok :

 

Repro:

http://www.babylonjs-playground.com/#1DWSMW

cameraPlayer.attachPostProcess(new BABYLON.FxaaPostProcess("fxaa", 1.0, this.cameraPlayer, BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, true));// OrcameraPlayer.__fxaa_cookie = new BABYLON.FxaaPostProcess("fxaa", 1.0, this.cameraPlayer, 2.0,  BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, false);var size = { precision: 0.5 };BABYLON.Tools.CreateScreenshot(engine, camera, size); // => return image black//*****************//cameraPlayer.attachPostProcess(new BABYLON.FxaaPostProcess("fxaa", 1.0, this.cameraPlayer, BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, true));// and//cameraPlayer.__fxaa_cookie = new BABYLON.FxaaPostProcess("fxaa", 1.0, this.cameraPlayer, 2.0,  BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, false);var size = { precision: 0.5 };BABYLON.Tools.CreateScreenshot(engine, camera, size); // => return image Ok

[GameMonetize]

This is because you call CreateScreenshot right after setting the postprocess. But setting postprocess takes time as  babylon,js needs to compile a shader (asynchronously)

[Dad72]

No it does not change. I waited 3 minutes to create a screen and the texture is black.

[GameMonetize]

OMG I spent 2 hours trying to figure out why it was not working...

 

THIS IS A SIMPLE TYPO!!!!!!

camera.__fxaa_cookie = new BABYLON.FxaaPostProcess("fxaa", 1.0, camera, 2.0,  BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, false);

 

the 2.0 is a typo, you should call this:

camera.__fxaa_cookie = new BABYLON.FxaaPostProcess("fxaa", 1.0, camera,  BABYLON.Texture.BILINEAR_SAMPLINGMODE, engine, false);

 

 

 

http://www.babylonjs.com/Playground#1DWSMW#3

[Dad72]

 thank you Dk. is the signature that change? I cross that it's something that I copy here or in the tutorials with this error.

[RaananW]

Documentation ist wrong...  http://doc.babylonjs.com/page.php?p=22431

var postProcess = new BABYLON.FxaaPostProcess("fxaa", 1.0, null, null, engine, true);

Only 6 vars instead of 7

[Dad72]

I had to copy it on the forum and not the documentation.