BAT99-129 is a massive eclipsing binary system in the Large Magellanic Cloud ( LMC ) which consists of WN3 ( h ) and O5 V components .
A broad-band MACHO light curve of the system is studied in the present paper .
A dense and extended atmosphere of the Wolf-Rayet ( WR ) star does not allow one to analyze the light curve in terms of standard parametric models of Wilson-Devinney type .
Distributions of brightness and absorption across the WR star disk are restored using direct solution of integral equations describing eclipses in the system .

As a result , reliable estimates of the orbital inclination and component parameters have been obtained .
The orbital inclination is 78 ^ { \circ } , the orbital separation is 28.5 R _ { \odot } , the radius of the O component is R _ { O } = 7.1 R _ { \odot } .
The size of the WR component core which is opaque in optical continuum is R _ { WR } = 3.4 R _ { \odot } .
The brightness temperature in the center of the WR disk is T _ { br } = 45 000 K. Probable errors of the parameters are discussed .
Evolutionary status of the system is discussed .