piezo: fixed for 3d mesh
piezo: fixed for 3d mesh

sfepy/sfepy,sfepy/sfepy,vlukes/sfepy,rc/sfepy,rc/sfepy,RexFuzzle/sfepy,lokik/sfepy,sfepy/sfepy,olivierverdier/sfepy,olivierverdier/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,vlukes/sfepy,lokik/sfepy,RexFuzzle/sfepy,lokik/sfepy,BubuLK/sfepy,olivierverdier/sfepy,BubuLK/sfepy,vlukes/sfepy,lokik/sfepy,rc/sfepy,BubuLK/sfepy