Finally, the section for which we were waiting so eagerly, adding hills and digging valleys. Preparing the terrain to get the 3D model should be our next logical step. Why? Let's say that we skip this stage and add not only the 3D model, but also additional interior and exterior 3D models. Then, if we start to sculpt the terrain, it is more than certain that our scene will be messed up because the 3D models use the terrain as the base and if that base is changed, we may need to tweak again the 3D models present in the scene.

For some, the idea of sculpting the terrain looks like a difficult task, but actually is easy, and the time it takes, depends on the approach we choose. And it may look somehow confusing having some options to change the terrain, but these are ways to accomplish different results. The options available to create the terrain are:

Unless we need...