\def\baseU{2.44527 2.0613 2.4479 2.19876 2.45784 2.30781 2.47771 2.39206 2.51023 2.45529 2.55818 2.50128 2.62412 2.5338 2.71092 2.55654 2.82129 2.57329 2.82129 2.64933 1.89328 2.64933 1.89328 2.57329 1.99897 2.56081 2.08363 2.53938 2.14932 2.5062 2.19827 2.45825 2.23259 2.39272 2.25435 2.30666 2.26593 2.19712 2.2693 2.0613 2.2693 0.981296 2.26388 0.798422 2.24729 0.652254 2.21863 0.534662 2.17733 0.437354 2.07016 0.30687 1.91726 0.207263 1.72839 0.143622 1.51333 0.121286 1.31674 0.139188 1.15325 0.192728 1.02276 0.281578 0.925292 0.405328 0.879224 0.506332 0.848266 0.622774 0.830693 0.762454 0.825274 0.933339 0.825274 2.21329 0.827737 2.31027 0.837099 2.38705 0.856067 2.44634 0.887272 2.49077 0.933422 2.52296 0.997391 2.5457 1.08172 2.56155 1.1893 2.57329 1.1893 2.64933 0.0573175 2.64933 0.0573175 2.57329 0.163495 2.56287 0.246843 2.54792 0.310073 2.52583 0.355812 2.4938 0.386688 2.44913 0.405493 2.38935 0.414772 2.31159 0.417318 2.21329 0.417318 0.965283 0.432509 0.72271 0.478495 0.513969 0.555684 0.338403 0.664325 0.195766 0.804744 0.0855657 0.977518 0.00730839 1.18289 -0.0392518 1.42128 -0.0546898 1.72265 -0.0285766 1.97228 0.0492701 2.16936 0.178111 2.31331 0.35729 2.37441 0.487938 2.41522 0.634763 2.43813 0.807865 2.44527 1.01734 } \psset{lightsrc=40 20 25,viewpoint=50 10 20 rtp2xyz,Decran=30} \begin{pspicture}(-6,-2)(6,6) \psframe(-6,-2)(6,6) \psSolid[object=grille,base=0 4 -10 10,hue=0 1,grid]% \psSolid[object=prisme,h=1,hue=0 1,incolor=yellow, base=\baseU,ngrid=1,decal=1,RotZ=90,RotX=90,unit=4](0,-1,0) \end{pspicture}