notice the front glass , the logo part isn`t display well

and the glass isn`t smooth enough ,

this 2 problem seems didn`t hanppen when LFS older version,

can somebody tell me how to fix it ?

Quote from Jarod.Yi :

notice the front glass , the logo part isn`t display well

and the light glass isn`t smooth enough ,

this 2 problem seems didn`t hanppen when LFS older version,

can somebody tell me how to fix it ?

There's two "layers" on top of each other where the windscreen visor is. Select the faces on the back side (so from inside the car) and delete them.
Don't know how to explain it better

Quote from joen :

There's two "layers" on top of each other where the windscreen visor is. Select the faces on the back side (so from inside the car) and delete them.
Don't know how to explain it better

OK, delete success,thanks

but how about glass smooth problem?

make sure vertices are welded together as one object. At the moment they may be 3 or 4 seperate polygons that made up the glass. You will have to weld those touching vertices to make them as one element, then apply auto smooth group.

you will be able to tell if the glass is one element or not by go to the sub-level, choose from (vertice, edge, face, polygon, element), select element as your sub-level, click on the glass object, if the glass object is highlighted in red, that mean your glass is a single object, but if only part of your glass highlighted, that means your glass was made up by fragmented elements, which they'll need to become one object, otherwise will not be able to smooth.