The same operation is more slower in walktrough mode. E.g. moving the camera with backward\forward using 'W'\'S'. I experience this only under linux.
Solved in libgltf: https://gerrit.libreoffice.org/gitweb?p=libgltf.git;a=commit;h=928b49dac5625f560af00d74bda2426f361cb283 Updating libgltf is coming soon, which will fix this problem.
Solved now by the libgltf update: master: http://cgit.freedesktop.org/libreoffice/core/commit/?id=11b328103f9184b98a822577aaac18d1cdbc5868 libreoffice-4-3 branch: http://cgit.freedesktop.org/libreoffice/core/commit/?h=libreoffice-4-3&id=b3af0dbd159c251480dc761a7a00204a3ad74ecb libreoffice-4-3-0 branch: http://cgit.freedesktop.org/libreoffice/core/commit/?h=libreoffice-4-3-0&id=1293b2fde524de3668a831bfe962eb9291d7a4ae