Rendering

Hello,

I`m a student who is learning to use Microstation V8i (select series 3). So I`m quite new at working with MS and i have a problem, which i can`t solve. So i`m trying to render a house first floor, but it will fail every time i use it. Okay not every time one time it succeeded, but then i had accidentally push some button and now  it won`t work. And i don`t now what button it was. I think there are some lighting problem. I tried to solve a problem by changing some lightning setting, but it didn`t work and  can`t figure it out by myself, so maybe someone can tell me, what might be wrong or what should i do? I added a picture about situation to, and maybe it is naive to believe that somebody can help me just seeing a picture, but i try anyway. By the way, does MS have any way to format rendering setup? Could this help? I added a picture about my situation, maybe it is naive to believe that somebody can help me just seeing a picture, but i try anyway.