Added comment on OpenGL 3.0 emulation (#1735)

* Added comment on OpenGL 3.0 emulation

* Updated line change

Author: vincentpierre

docs/Unity-Inference-Engine.md

@@ -8,7 +8,13 @@ to run the neural network within Unity.
 
 ## Supported devices
 
-Scripting Backends : The Unity Inference Engine is generally faster with __IL2CPP__ than with __Mono__ for Standalone builds.
+Scripting Backends : The Unity Inference Engine is generally faster with 
+__IL2CPP__ than with __Mono__ for Standalone builds.
+In the Editor, It is not possible to use the Unity Inference Engine with 
+GPU device selected when Editor Graphics Emulation is set to __OpenGL(ES) 
+3.0 or 2.0 emulation__. Also there might be non-fatal build time errors 
+when target platform includes Graphics API that does not support 
+__Unity Compute Shaders__.
 The Unity Inference Engine supposedly works on any Unity supported platform
 but we only tested for the following platforms :