How did Rimmer walk through the door? Although he can project 'soft' light, his light bee is a little machine and is not holographic.
The rules of holograms on Red Dwarf have been incredibly inconsistent throughout the series, Rimmer even didn't get his light bee until series 3! Also sometimes he is powered by Red Dwarf or Starbug and other times he can exist completely interdependently such as in Meltdown. My guess is the station had holographic projection equipment and therefore he didn't need his light bee.