\def\baseZ{2.2973 0.705301 2.25049 0.561268 2.20779 0.456241 2.16287 0.376752 2.10933 0.309334 2.0227 0.242737 1.9088 0.193796 1.77011 0.163577 1.60932 0.153312 0.581305 0.153312 2.30929 2.58931 2.30929 2.64933 0.205292 2.64933 0.12531 1.9653 0.229352 1.9653 0.256204 2.09242 0.285274 2.18726 0.32042 2.26117 0.365338 2.3253 0.450739 2.40109 0.568741 2.4548 0.719097 2.48674 0.901314 2.49734 1.7853 2.49734 0.037281 0.0613412 0.037281 0.00131387 2.29328 0.00131387 2.38935 0.705301 } \psset{lightsrc=40 20 25,viewpoint=50 10 20 rtp2xyz,Decran=30} \begin{pspicture}(-6,-2)(6,6) \psframe(-5,-2)(5,6) \psSolid[object=grille,base=0 4 -10 10,hue=0 1,grid]% \psSolid[object=prisme,h=1,hue=0 1,incolor=yellow, base=\baseZ,ngrid=1,decal=2,RotZ=90,RotX=90,unit=4](0,-1,0) \end{pspicture}