public override Material GetModifiedMaterial(Material baseMaterial) { var toUse = baseMaterial; if (m_ShouldRecalculateStencil) { var rootCanvas = MaskUtilities.FindRootSortOverrideCanvas(transform); m_StencilValue = maskable ? GetStencilDepth(transform, rootCanvas) : 0; m_ShouldRecalculateStencil = false; } // if we have a enabled Mask component then it will // generate the mask material. This is an optimisation // it adds some coupling between components though :( Hole maskComponent = GetComponent <Hole>(); if (m_StencilValue > 0 && (maskComponent == null || !maskComponent.IsActive())) { var maskMat = StencilMaterial.Add(toUse, (1 << m_StencilValue) - 1, StencilOp.Keep, CompareFunction.NotEqual, ColorWriteMask.All, (1 << m_StencilValue) - 1, 0); StencilMaterial.Remove(m_MaskMaterial); m_MaskMaterial = maskMat; toUse = m_MaskMaterial; } return(toUse); }