THE PROBLEM: the clay isn't picking up the fine detail in the mold. WHY THIS IS HAPPENING: the clay is very firm and cannot get into the small parts of the mold. SOLUTION: condition the clay thoroughly and then use more pressure when you press it into the mold. Press firmly with your fingers so that the clays gets into even the minutest pattern. If it still doesn't work then try mixing some translucent with your clay to soften it up a bit.