Cutting Down Your Model
Now it’s time to start cutting the sides to their correct height. First, study your model, and work out how best to approach it, then create another sketch box over the part you need to cut. To do this, lower your new model’s Opacity to 50% and set the Visual Style to “Shaded with Visible Edges.”
Right-click on the New Body in the Data Menu → Go to Opacity Control + Left Click Display Settings → Visual Style → Select Shaded with Visible Edges.
The excess walls can be cut down from the top or the side. If you’re cutting something down to a uniform height, doing it from the top is faster as you can draw mainly rough shapes. However, if you need to cut it down to a gradient slope, it’s better to do it from the side, as you can control the gradient of the cut.
Then extrude and cut it.
Now let’s do a whole side wall by sketching it. Carefully trace the shape of the original model, as these cuts need to be accurate as possible.
Go to the Solid Tab → Sketch → Select your surface to cut down → Sketch it → Extrude and Cut.
Once you’ve finished the sketch, select the Extrude Tool and carefully cut down the wall to the correct height.
For speed, I will do the rest of the wall cutting in one go, as you’ve seen the two main techniques already.
And with that, we’ve finished removing all the excess wall parts, so we’re ready to move on to creating holes.