how come everytime im flying my 738 the ground is always hazy like theres all kinds of smog until im down close on approach, is it my settings in ASE or my REX textures?. if so what should i look at to change. thank you

Have you a base case? Do not turn on REX weather engine, set your weather to clear blue skies. Do you still have the haze? Check your advanced weather settings, go into custom weather and check the visibility distance is not set too low. The advanced weather settings with a low visibility will create a haze effect.

 

I do not have ASE, so I can not comment on that.