[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 3} A$+PX  
DECLARE CYLINDER Cylinder001 . ,7bGY 1$  
BEGIN Cylinder001 bOY;IB _  
Position = 0 0 -0.3 ^;C&  
Vector_axis = 0 1 0 Jh[0xb  
Radius = 0.2 gcLz}84  
Length = 60 Z$oy;j99
y  
Surface = SURFACE_LAMP [oWkd_dK  
material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 3v* ~CQy9  
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Color = 255 0 0 ?ukw6T  
END rIb+c=|F  
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DECLARE SOURCE src Lu.zc='\  
gN&i&%*!  
BEGIN src eH&F gmU  
geometry = Cylinder001 yNu_>!Cp5  
emission = LAMBERT *zfgO pK  
power = 200 P rt} 01$  
unit = Lumen Cu"Cpt[  
spectrum = BLACKBODY 5000 Bx\&7|,x  
END sFU< PgV  
DECLARE CURVE2D_CONIC MyCurve2DConic001 ~lj~]j  
BEGIN MyCurve2DConic001 4=PjS<Lu8  
Position = 0 -0.8 jU,Xlgz(A  
Orientation = 1 0 $JE,u'JQ  
Radius = 1 b*|~F  
Conic = 0 37AVk
`a  
XMin = -1 0^;2  
XMax = 1 :=QX^*  
END P<<$o-a"  
DECLARE VOLUME_EXTRUSION MyVolumeExtrusion001 =KRM`_QShg  
BEGIN MyVolumeExtrusion001 7WJ\nK  
Position = 0 30 0 bMH~vR  
Vector_I = 1 0 0 ZsGvv]P  
Vector_J = 0 0 1 .6?"<zdPU  
Generatrix = MYCURVE2DCONIC001 5=>1>HYM  
Length = 30 Lp`.fn8Ln  
Surface = SIMPLE_SCATTERING_REFLECTION_ONLY 2.000000 10.000000 80.000000 25.000000 A2 l?F  
Material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 tRjv-  
Color = 255 155 255 !oLn=  
END {I
#_0Q,i  
]TV_p[L0B  

粗看了一下： .qBc;u  
光源定义了光强、散射方式、光谱， Pk?$\  
怎么没有定义光源的出光角度？