render.SetStencilEnable(true)
render.SetStencilPassOperation(3)
render.SetStencilReferenceValue(1)
render.SetStencilFail(1)
render.SetStencilZFail(1)
render.SetStencilCompareFunction(STENCIL_ALWAYS)

ent:Draw()

render.SetStencilCompareFunction(STENCIL_EQUAL)
render.SetStencilPassOperation(1)
render.SetColorMaterial()
render.DrawScreenQuad()
render.SetStencilEnable(false)