Babylon.js/src/Shaders/ShadersInclude/clipPlaneVertexDeclaration.fx

#ifdef CLIPPLANE
	uniform vec4 vClipPlane;
	varying float fClipDistance;
#endif

#ifdef CLIPPLANE2
	uniform vec4 vClipPlane2;
	varying float fClipDistance2;
#endif

#ifdef CLIPPLANE3
	uniform vec4 vClipPlane3;
	varying float fClipDistance3;
#endif

#ifdef CLIPPLANE4
	uniform vec4 vClipPlane4;
	varying float fClipDistance4;
#endif