[求助]请教：光源旁边加反光罩后，在罩内无光线出来？？ [复制链接]

#define SURFACE_LAMP PERFECT_MIRROR 34.00 ?M?S+@(  
DECLARE CYLINDER Cylinder001 IoUQ~JviA  
BEGIN Cylinder001 =D88jkQe"  
Position = 0 0 -0.3 rz/^_dV  
Vector_axis = 0 1 0 a|aRUxa0"  
Radius = 0.2 R1$O)A}k  
Length = 60 ukM11LD5x  
Surface = SURFACE_LAMP 022nn-~  
material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 l-|hvv5g  
ia=eFWt.  
Color = 255 0 0 OT-!n  
END Np$peT[  
(Ic{C5'  
DECLARE SOURCE src [X>\!mt  
*]uo/g  
BEGIN src d:KUJ Y.  
geometry = Cylinder001 xRum q  
emission = LAMBERT ma4Pmk  
power = 200 Ph[P$: 9  
unit = Lumen ^@
W98_bd;  
spectrum = BLACKBODY 5000 +)8,$1[p|  
END F!v`._]  
DECLARE CURVE2D_CONIC MyCurve2DConic001
)na8a!  
BEGIN MyCurve2DConic001 /58]{MfrJ  
Position = 0 -0.8 F3k]*pk8w  
Orientation = 1 0 %4X#|22n  
Radius = 1 )Rhy^<xH  
Conic = 0 l+# l\q%l  
XMin = -1 &+t! LM  
XMax = 1 Bl,rvk2  
END ~`J/618  
DECLARE VOLUME_EXTRUSION MyVolumeExtrusion001 {O\>"2}m'f  
BEGIN MyVolumeExtrusion001 "&jWC  
Position = 0 30 0 ziFg+i%
s  
Vector_I = 1 0 0 N^,@s"g  
Vector_J = 0 0 1 M7D@Uj&xx(  
Generatrix = MYCURVE2DCONIC001 GE+%V7  
Length = 30 tnx
)_f  
Surface = SIMPLE_SCATTERING_REFLECTION_ONLY 2.000000 10.000000 80.000000 25.000000 j1{@?  
Material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 1<Vc[p&  
Color = 255 155 255 \;"$Z9W  
END ?$rSbw  
i={ :6K?^  

粗看了一下： o_un=ygU  
光源定义了光强、散射方式、光谱， +APf[ZpU  
怎么没有定义光源的出光角度？