[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 60p1.;'/a  
DECLARE CYLINDER Cylinder001 .KB*u*h  
BEGIN Cylinder001 r]]Ke_s!  
Position = 0 0 -0.3 /`'50Cj  
Vector_axis = 0 1 0 ZU:gNO0  
Radius = 0.2 B@s\>QMm  
Length = 60 +0=RC^   
Surface = SURFACE_LAMP OsK=% aDpj  
material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 rSZWmns  
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Color = 255 0 0 g`Rs;  
END 8F@6^9C  
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DECLARE SOURCE src %V+,#  
K]7@%cS  
BEGIN src w6cPd'  
geometry = Cylinder001 dIf Jr}ih  
emission = LAMBERT L?Lp``%bI7  
power = 200 s@q54  
unit = Lumen {bNnhW*qOu  
spectrum = BLACKBODY 5000 .*zQ\P  
END *3k~%RM%?  
DECLARE CURVE2D_CONIC MyCurve2DConic001 V3`*LU  
BEGIN MyCurve2DConic001 {#;6$dU;(  
Position = 0 -0.8 Dnp^yqz*  
Orientation = 1 0 PNKmI
 
Radius = 1 Y

J"gm]Pm  
Conic = 0 kNjbpCE\!  
XMin = -1 kB8
l`| I  
XMax = 1 JZ
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END Tru`1/ 7I  
DECLARE VOLUME_EXTRUSION MyVolumeExtrusion001 .CYq+^  
BEGIN MyVolumeExtrusion001 T[7DJNdG6  
Position = 0 30 0 3!}#@<j  
Vector_I = 1 0 0 % ,X(GwX  
Vector_J = 0 0 1 L3W ^ip4  
Generatrix = MYCURVE2DCONIC001 62zlO{ >rJ  
Length = 30 'Gc6ZSLM  
Surface = SIMPLE_SCATTERING_REFLECTION_ONLY 2.000000 10.000000 80.000000 25.000000 NT-du$!u  
Material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 r!zNcN(%cs  
Color = 255 155 255 %_z]iz4  
END $DQ -.WI  
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粗看了一下： I,#U _  
光源定义了光强、散射方式、光谱， &zm5s*yNt  
怎么没有定义光源的出光角度？