[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 ebmU~6v k  
DECLARE CYLINDER Cylinder001 VFjNrngl  
BEGIN Cylinder001 /IyCvo  
Position = 0 0 -0.3 j/*4Wj[  
Vector_axis = 0 1 0 #Ss lH  
Radius = 0.2 +VdC g_  
Length = 60 t?6_^ 08  
Surface = SURFACE_LAMP r8Pdk/CW^  
material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 (Aw!K`0Y1  
} D0Y8  
Color = 255 0 0 0DgEOW9H  
END @l^BW*BCo  
';.n#  
DECLARE SOURCE src g@][h_? {  
aK4ZH}XHE"  
BEGIN src NAt; r  
geometry = Cylinder001 O0cKmh6=  
emission = LAMBERT [|
E|(@J  
power = 200 `zBQ:_3J_  
unit = Lumen jg+q{ ^  
spectrum = BLACKBODY 5000 %.`<ud  
END P K9BowlW  
DECLARE CURVE2D_CONIC MyCurve2DConic001 Bgy?k K2[  
BEGIN MyCurve2DConic001 6p1)wf.J  
Position = 0 -0.8 |\iJ6m;a  
Orientation = 1 0 /By`FW Y  
Radius = 1 +ZU@MOni  
Conic = 0 f )K(la^'  
XMin = -1 OZed+t=  
XMax = 1 >UDb:N[  
END ,a1 1&"xl  
DECLARE VOLUME_EXTRUSION MyVolumeExtrusion001 (TQhO$,  
BEGIN MyVolumeExtrusion001 y4Fuh nb>  
Position = 0 30 0 *^_y
wqp  
Vector_I = 1 0 0 |uRZT3bGyj  
Vector_J = 0 0 1 * M,'F^E2  
Generatrix = MYCURVE2DCONIC001 DgB]y6~KXl  
Length = 30 JC}oc M j0  
Surface = SIMPLE_SCATTERING_REFLECTION_ONLY 2.000000 10.000000 80.000000 25.000000 =%
IBl]Z!"  
Material = BASIC_MATERIAL PMMA 1.49000 1.70e-003 57.20 LYvjqNC&4  
Color = 255 155 255 $`O%bsjX  
END E,g5[s@  
@/yJTMcf  

粗看了一下： E`aAPk_y  
光源定义了光强、散射方式、光谱， &Y/Myh[P  
怎么没有定义光源的出光角度？