[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 >W,1s  
DECLARE CYLINDER Cylinder001 k'uN2m  
BEGIN Cylinder001 k> I;mEV  
Position = 0 0 -0.3 &:g5+([<  
Vector_axis = 0 1 0 k;v23  
Radius = 0.2 B mq7w,L.  
Length = 60 L^:+8g  
Surface = SURFACE_LAMP ^7C?yC  
material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 wy5vn?T@  
0Zkb}F2-  
Color = 255 0 0 Ug=8:a(U.  
END k~WX6rEJ  
BJDe1W3;'  
DECLARE SOURCE src )>q.!
"B  
6 flc  
BEGIN src (KaP=t}  
geometry = Cylinder001 * ";A~XNx  
emission = LAMBERT f/G YDat  
power = 200 *9}2Bmojv  
unit = Lumen #z{9:o7[-  
spectrum = BLACKBODY 5000 *h Ph01  
END I^'kt[P'FZ  
DECLARE CURVE2D_CONIC MyCurve2DConic001 ]qCAog  
BEGIN MyCurve2DConic001 :(EU\yCzK  
Position = 0 -0.8 kQX
tO)  
Orientation = 1 0 Hw8`/'M=%5  
Radius = 1 \;x+KD  
Conic = 0 h
A)tad]  
XMin = -1 L_uliBn  
XMax = 1 ~JY<DW7  
END g:MpN^l  
DECLARE VOLUME_EXTRUSION MyVolumeExtrusion001 .3k"1I '\  
BEGIN MyVolumeExtrusion001 kBd #=J
 
Position = 0 30 0 5-O[(b2O  
Vector_I = 1 0 0 '7}s25[{\  
Vector_J = 0 0 1 R?g qPi-  
Generatrix = MYCURVE2DCONIC001 {q%&~  
Length = 30 H)1< ;{:  
Surface = SIMPLE_SCATTERING_REFLECTION_ONLY 2.000000 10.000000 80.000000 25.000000 C,:3z  
Material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 "YD<pRVB  
Color = 255 155 255 O G#By6O  
END 5!,`LM9  
:|xV}  

粗看了一下： MnUal}MO  
光源定义了光强、散射方式、光谱， 5'gV_U  
怎么没有定义光源的出光角度？