I have a working alternative to tplquad which I builded from http://dl.acm.org/citation.cfm?id=155785&dl=ACM&coll=DL&CFID=66021551&CFTOKEN=74592904 via F2PY. For testing aim you can use Scilab's int3d function (also from this code), I found it faster and smarter. How can we include it in standart Scipy library? Vladímir