場景：在遮罩層下的ui物件使用material（shader）會導致本身不受mask的影響。如：


以上沒有任何配置錯誤！
解決辦法：
修改自定義shader，使它支援mask引數

Shader "....." {
    Properties{
        .....
        //MASK SUPPORT ADD
        _StencilComp("Stencil Comparison", Float) = 8
        _Stencil("Stencil ID", Float) = 0
        _StencilOp
 
("Stencil Operation", Float) = 0
        _StencilWriteMask("Stencil Write Mask", Float) = 255
        _StencilReadMask("Stencil Read Mask", Float) = 255
        _ColorMask("Color Mask", Float) = 15
        //MASK SUPPORT END


    }
        SubShader{
            Tags {
 
...}

            //MASK SUPPORT ADD
            Stencil
            {
                Ref[_Stencil]
                Comp[_StencilComp]
                Pass[_StencilOp]
                ReadMask[_StencilReadMask]
                WriteMask[_StencilWriteMask]
            }
            ColorMask[_ColorMask]
 

            //MASK SUPPORT END


            Pass { ...}

        }
            FallBack "Transparent/VertexLit"
}

主要為這兩段程式碼：

		//MASK SUPPORT ADD
        _StencilComp("Stencil Comparison", Float) = 8
        _Stencil("Stencil ID", Float) = 0
        _StencilOp("Stencil Operation", Float) = 0
        _StencilWriteMask("Stencil Write Mask", Float) = 255
        _StencilReadMask("Stencil Read Mask", Float) = 255
        _ColorMask("Color Mask", Float) = 15
        //MASK SUPPORT END

			//MASK SUPPORT ADD
            Stencil
            {
                Ref[_Stencil]
                Comp[_StencilComp]
                Pass[_StencilOp]
                ReadMask[_StencilReadMask]
                WriteMask[_StencilWriteMask]
            }
            ColorMask[_ColorMask]
            //MASK SUPPORT END