Greetings to all. We are going to learn basic knowledge of 3D Modeling. To develop a model in virtual environments is different from in real world. Now, I will introduce the process for developing building models. To begin modeling we import a plan on the building and draw the first floor slab. Then we usually create columns following walls and beams. However, it's totally not the case when we build real house. In general, we could build columns and beams first and the walls later. Next, we draw the staircase then the window sill. Then we draw windows and doors. They may not be necessary when we just draw the structural model. After that, we draw slabs and then finish the entire floor. If we want to draw many floors, we should repeat step 1 to 9 to draw the second floor, the third, and so on. Now, I will explain the details for each step. First, we are going to create the first floor slab. We need to import floor plan, a DW file into SketchUp. There will be a DW file which you can do yourself and a SKP file, which is done for you, because importing a DW file into SketchUp directly is a function only in SketchUp Pro, we will not be able to do it in SketchUp Make. In that case, we need to convert the DW file into PNG or BNP format and the importance of an image file. It will be less precise and with lower resolution; therefore, this way can just be used as a purchasing cost. If we will use models for engineering purposes, we must import DW file for accuracy of the models. If you will import a plan, the building order will suggest use columns, walls, and beams. If not, columns, beams, and walls would be better. After that, we can draw the first floor slab. Second, we are going to create the columns. We create and then select the color layer as active layer, and draw columns using Rectangle tool and a Push/Pull Tool. Third, we are going to create the walls. We create and select the wall layer as active layer and draw walls using Rectangle Tool and Push/Pull Tool. To prevent the columns from being located above the plan, we will be very careful when we choose the start points of the line or rectangle in SketchUp. We must start from points on the plan. They are the walls and I will put them up in a finished drawing. First, we are going to create the beams. We create and select the beam layer as active layer and draw beams in different size. We should be very careful about the dimension of the beam cross sections. However, if the walls of the building we work on are built by bricks, the steps of the 3D model is different from building construction. The construction process is composed of following steps: columns, beams, slabs, walls, and windows. It depends on the materials we use. Fifth, we are going to create staircases. It's a compress and advanced step. We should be patient. They are plenty of free stairs and up means going up precise. We should know the tread size and the riser size to create the stairs. Here we don't have the exact amount so we need to divide the height of the floor by amount of the stairs. As a result, we will know each of the tread size and riser size. We can draw the steps in landing according to the size which was figured out. After that, we create a handrail and make all you need as a group. Sixth, we are going to create slabs. Before creating, we should look at the thickness of the slab we want to create in structural plan. This step is easy for us. So let's move on to the next segment. We are going to create windows and doors. To place the components, we need to make holes on walls. We can create a wall then draw the rectangle and push the thickness of the wall inward to make a hole. Before that, we should add a layer for windows and doors. Create a frame of them and create the glass on the window. We usually hide the color layer while we draw. So we can add the window and doors easier after that. The windows and doors are independent group, so we can copy it easier or even make them components which can be used into other file. However, you can ignore this step when you are working on a structural model. Now we have finished one third of the model. To develop entire building, we need to repeat steps 1 to 8 to view other floors. Eight, we are going to assemble a model of every floor. We stack them one by one. The five storey building model is done. Today we have a general understanding of a 3D building modeling. We will explore more about modeling in following videos. Let's start learning for now. Good bye.