Before you start to add the tail and the fins, have a look at a smoothed preview of the model. Click the button on the left-hand side of the screen marked Smooth.
Now it’s time to create the fins and tail. Select the face from which you are going to extrude the lower fin. Press [NumPad 3] for the Right view and [Z] for Transparency to make it easier to select the right face.
Extrude the fin, and begin to shape it. You may need to view the model from different directions to do this.
Now do the same for the tail. Select the outermost face on the end of the model, as shown below.
Start to extrude and shape the tail, working in the Top view. The image below shows the kind of result you are looking for.
Take some time to examine your handiwork. The image below shows a smoothed preview of the model after the fins and tail have been completed, as seen from the Camera view.
Now for the eyes. Taking the background image as your guide (you may need to go back into Transparency mode) delete the polygon at the location of the eye by hitting [X].
Subdivide the adjacent polygons and move the vertices to shape the eye, as shown below.
Once you have shaped the eye your model is done. You could do a bit of extra sculpting to tweak the model to your satisfaction. The image below shows the completed whale.
You will notice that we have been able to maintain a low poly count (3,512) for the model. This is largely because we have avoided subdividing the model too much: had we made use of the Subdivision Surface modifier, it would have been much higher.
This tutorial has shown you the process of adding detail to a model while still maintaining a low poly count. Experiment for yourself, and have fun…
By Vivek Chauhan