Como Escribir En Un Pdf Protegido

I see in my log that I have an error message : WARNING: Shader Unsupported: 'Hidden/PostProcessing/Uber' - Pass '' has no vertex shader
WARNING: Shader Unsupported: 'Hidden/PostProcessing/Uber' - Pass '' has no vertex shader
WARNING: Shader Unsupported: 'Hidden/PostProcessing/FinalPass' - Pass '' has no vertex shader
WARNING: Shader Unsupported: 'Hidden/PostProcessing/FinalPass' - Pass '' has no vertex shader .