Rapid prototyping via laser beam melting allows building complicated three-dimensional metal structures. The products can be porous and can contain internal channel structures with small structure size. Therefore, they can be used to build burner matrices that provide specific internal channel structures. The aim is to replace the commonly employed sintered porous burner matrices of a high pressure burner with complex structures that potentially also incorporate cooling channels that allow to stabilize homogeneous sooting flames at high pressure. This in turn would help in providing a convenient standard flame for LII development for high-pressure flame diagnostics.