Due to the sensor used in the GH3, the camera has mild doses of moire and aliasing in video mode. Unlike the Sony and Canon moire which appears indiscriminately over all sorts of things like brick walls, roof tiles and asphalt, the GH3's moire tends to limit itself to certain kinds of patterns involving very fine horizontal lines. That said, there's also some unstable rendering of very fine textures such as grass and foliage on wide angle shots.
My real world test report of the pre-production model - eoshd.com/content/9170/panasonic-gh3-real-world-test-pre-production-firmware
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