Emulation in c#

[Vvafel]

Hey, I have a problem with canvas emulation, an audiocontent and Clientrect in c#, can someone kindly paste the code ready to emulate it? thank you very much

 

[Vvafel]

I tried it:
instance.CanvasRenderMode = ZennoLab.InterfacesLibrary.Enums.Browser.CanvasMode.Emulate;

but it does not work; (

 

[Vvafel]

next question, I paste it in the cube c #:

// set Chrome useragent
instance.SetHeader(ZennoLab.InterfacesLibrary.Enums.Browser.NavigatorField.UserAgent, "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36");
// set webgl context params
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.Renderer, "WebKit WebGL");
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.Vendor, "WebKit");
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.Version, "WebGL 1.0 (OpenGL ES 2.0 Chromium)");
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.ShadingLanguageVersion, "WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium)");
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.UnmaskedRenderer, "Google Inc.");
instance.WebGLPreferences.Set(ZennoLab.InterfacesLibrary.Enums.Browser.WebGLPreference.UnmaskedVendor, "ANGLE (NVIDIA GeForce GT 630 Direct3D11 vs_5_0 ps_5_0)");

and nothing changes, I check it on the site, browserleaks.com/webgl, do I have to add anything to this cube c #? What do I have to do to make it work?