\def\baseV{2.78934 2.64933 1.96932 2.64933 1.96932 2.57329 2.10769 2.55769 2.19777 2.52673 2.24663 2.47705 2.26133 2.40528 2.25616 2.34953 2.2413 2.2803 2.2174 2.20048 2.18529 2.11328 1.59734 0.645274 0.993285 1.99733 0.911989 2.18143 0.861734 2.30625 0.83636 2.38763 0.829297 2.44133 0.839973 2.49159 0.87323 2.52879 0.930547 2.55318 1.01332 2.56533 1.05627 2.56779 1.12935 2.57329 1.12935 2.64933 0.0652828 2.64933 0.0652828 2.57329 0.190018 2.55432 0.286259 2.4938 0.377984 2.368 0.489334 2.15335 1.47334 -0.0427007 1.53328 -0.0427007 2.4213 2.2013 2.50744 2.39099 2.58274 2.50128 2.66937 2.55449 2.78934 2.57329 } \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=\baseV,ngrid=1,decal=1,RotZ=90,RotX=90,unit=4](0,-1,0) \end{pspicture}