The spontaneous development of the liquid-crystalline membranes freely suspended within an inert liquid matrix and their subsequent evolution to form rolled-up polygons and droplets, creating the bifilar filaments which can split to create framed membranes undergoing the primary and secondary encapsulation have been investigated for smectogens and nematosmectogens : 4-nitrophenyl 4’-n-octyloxybenzoate, 4-nonyloxy-4’-pentylbiphenyl, 4-dodecyloxy-4’-pentylbiphenyl, 4-heptyloxy-4’-hexylbiphenyl, 4-hexyl-4’-actyloxybiphenyl, 4-hexyl-4’-nonyloxybiphenyl, butyl(4’-pentylbiphenyl)ketone, 4-acetyl-4’-decylbiphenyl, 4-acetyl-4’-dodecylbiphenyl, 4-ethylphenyl 4-(4’-pentylcyclohexyl)benzoate, 4 "-pentylcyclohexyl 4-(4’-pentylcyclohexyl) benzoate, 4-nitrophenyl 4’-n-octyloxybenzoate (NPOOB), 4-cyano-4’-octyloxybiphenyl and cholesteryl nonanoate. Investigations have been performed at the transition from the isotropic melt of mixtures with silicone oil (SO). To induce the production of filaments in systems composed of smectogen and SO, an additional nematogen (here 4,4’-dipentylazoxybenzene) was added to the mixture. The phase transition of the type soft smectic-crystal smectic within the cores of filaments is announced here for the first time.