artículo sobre cómo cortar y seccionar objetos en blender utilizando las herramientas cuchillo y bisecar

Make Sections and Cut Objects in Blender

Introduction

In this article we are going to see how to make sections or cut objects in Blender as seen in figures 1 and 2. For this we are going to use the tools “Knife” and “Bisect”.

cut object in blender with the bisect tool
Fig. 1: Bisection of the cube.

cut object in blender with knife tool
Fig. 2: Cut on one side to form a crack

In the following video you can see the procedure to make sections or cut objects in Blender.



Procedure to Cut Objects in Blender

The tools we are going to use are Knife and Bisect, we can see them in figure 2. The knife can be accessed quickly with the K key.

tools for cutting or sectioning objects in blender
Fig. 3: These are the tools for cutting or sectioning objects in Blender.

default blender cube
Fig. 4: All the faces that are going to participate in the cut must be selected.

Bisect Tool

Let’s start by using the bisecting tool that will allow us to cut an object in two parts.

To use this tool, all the faces that will be involved in cutting must be selected. Then we mark two points on the object (figure 5), this will draw a plane perpendicular to the view and that passes through these two points, on this plane we will make the cut of the object. In figure 6 we can see the result.

cut object in blender with the bisect tool
Fig. 5: With the Bisect tool two points must be marked to make the cut.

cube cut in two parts with the bisect tool in blender
Fig. 6: The cube was divided into two parts.

Taking the result of figure 6 we can remove the top and create a new face, getting the result we were looking for.

You can also separate the object into two parts, here you can see how.

create a new face in blender
Fig. 7: We can remove the top and create a new face selecting the vertices and pressing F.

Knife Tool

Now let’s look at the knife tool, the shortcut is the letter K.

With the knife we can obtain a similar result as with the bisect tool, we mark the points where the cut will be made and at the end we press Enter.

cut object in blender with knife tool
Fig. 8: With the knife tool we can achieve a similar result.

cut object in blender with knife tool
Fig. 9: We mark the vertices of the cut and press Enter at the end.

new faces have been created as a result of a cut made in blender with the knife tool
Fig. 10: New faces have been created as a result of cutting.

The knife tool allows us to make irregular cuts in any part of the object, in this case we are going to make a crack on one of the faces making a star-shaped cut.

If we double-click while making the cut, the end point will automatically join the starting point.

irregular cut made in blender with the knife tool
Fig. 11: With the knife tool you can make irregular cuts in any part of the object.

To create the crack we select the new star shaped face, press E to extrude, S to scale and make that new face smaller and the G key followed by X to move the face in the X axis direction.

star-shaped face made with the blender knife tool
Fig. 12: At the end of the cut we have a new face that we can manipulate.

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