Using the Shrinkwrap modifier to re-topologize the mesh
by Enrico Valenza, Pierre-Armand Nicq, Romain Caudron
Blender 3D: Designing Objects
- Blender 3D: Designing Objects
- Table of Contents
- Blender 3D: Designing Objects
- Blender 3D: Designing Objects
- Credits
- Preface
- 1. Module 1
- 1. Straight into Blender!
- 2. Robot Toy – Modeling of an Object
- Let's start the modeling of our robot toy
- Using the basic modeling tools
- Modeling the head
- Modeling the antenna
- An introduction to the Subdivision Surface modifier
- Modeling the thunderbolts
- Modeling the eyes
- Modeling the chest
- Modeling the neck
- Modeling the torso
- Modeling the buttons
- Modeling the fork
- Modeling the main wheel
- Modeling the arm
- Using Blender Internal to render our Robot Toy
- Summary
- 3. Alien Character – Base Mesh Creation and Sculpting
- 4. Alien Character – Creating a Proper Topology and Transferring the Sculpt Details
- 5. Haunted House – Modeling of the Scene
- 6. Haunted House – Putting Colors on It
- 7. Haunted House – Adding Materials and Lights in Cycles
- 8. Rat Cowboy – Learning To Rig a Character for Animation
- 9. Rat Cowboy – Animate a Full Sequence
- 10. Rat Cowboy – Rendering, Compositing, and Editing
- 2. Module 2
- 1. Modeling the Character's Base Mesh
- 2. Sculpting the Character's Base Mesh
- 3. Polygonal Modeling of the Character's Accessories
- 4. Re-topology of the High Resolution Sculpted Character's Mesh
- 5. Unwrapping the Low Resolution Mesh
- 6. Rigging the Low Resolution Mesh
- Introduction
- Building the character's Armature from scratch
- Perfecting the Armature to also function as a rig for the Armor
- Building the character's Armature through the Human Meta-Rig
- Building the animation controls and the Inverse Kinematic
- Generating the character's Armature by using the Rigify add-on
- 7. Skinning the Low Resolution Mesh
- 8. Finalizing the Model
- 9. Animating the Character
- 10. Creating the Textures
- Introduction
- Making a tileable scales image in Blender Internal
- Preparing the model to use the UDIM UV tiles
- Baking the tileable scales texture into the UV tiles
- Painting to fix the seams and to modify the baked scales image maps
- Painting the color maps in Blender Internal
- Painting the color maps in Cycles
- 11. Refining the Textures
- 12. Creating the Materials in Cycles
- 13. Creating the Materials in Blender Internal
- 14. Lighting, Rendering, and a Little Bit of Compositing
- 3. Module 3
- 1. Overview of Materials in Cycles
- 2. Managing Cycles Materials
- 3. Creating Natural Materials in Cycles
- Introduction
- Creating a rock material using image maps
- Creating a rock material using procedural textures
- Creating a sand material using procedural textures
- Creating a simple ground material using procedural textures
- Creating a snow material using procedural textures
- Creating an ice material using procedural textures
- 4. Creating Man-made Materials in Cycles
- Introduction
- Creating a generic plastic material
- Creating a Bakelite material
- Creating an expanded polystyrene material
- Creating a clear (glassy) polystyrene material
- Creating a rubber material
- Creating an antique bronze material with procedurals
- Creating a multipurpose metal node group
- Creating a rusty metal material with procedurals
- Creating a wood material with procedurals
- 5. Creating Complex Natural Materials in Cycles
- 6. Creating More Complex Man-made Materials
- 7. Subsurface Scattering in Cycles
- Introduction
- Using the Subsurface Scattering shader node
- Simulating Subsurface Scattering in Cycles using the Translucent shader
- Simulating Subsurface Scattering in Cycles using the Vertex Color tool
- Simulating Subsurface Scattering in Cycles using the Ray Length output in the Light Path node
- Creating a fake Subsurface Scattering node group
- 8. Creating Organic Materials
- Introduction
- Creating an organic-looking shader with procedurals
- Creating a wasp-like chitin material with procedural textures
- Creating a beetle-like chitin material with procedural textures
- Creating tree shaders – the bark
- Creating tree shaders – the leaves
- Creating a layered human skin material in Cycles
- Creating fur and hair
- Creating a gray alien skin material with procedurals
- 9. Special Materials
- Bibliography
- Index
Sometimes, the Snap tool is not enough or can be quite difficult to use because of a particular shape of the high resolution mesh; in these cases, the Shrinkwrap modifier can be very handy.
Basically, the usage of this method is all in the preparation of the modifier:
- Assign the Shrinkwrap modifier to the Gidiosaurus_lowres mesh and, in the modifier stack, move it before the Subdivision Surface modifier.
- Click on the Target field to select the Gidiosaurus mesh item and leave the Mode option to Nearest Surface Point (this seems to be the more efficient mode for this task; by the way, you can experiment with the other two modes that can reveal themselves useful in other situations).
- Enable the Display modifier in Edit mode and Adjust edit cage to modifier result buttons (the penultimate one and the last one to the right, with the cube and four selected vertices image and with the upside-down triangle and three vertices image, respectively) and the Keep Above Surface item.
- In Edit Mode, if it's necessary to make the low resolution mesh more easily visible against the high resolution one, change the Offset value to 0.001.
- Having the X-Ray item still active, go to the Shading subpanel under the Properties 3D view sidepanel and check the Backface Culling item:
The Shrinkwrap modifier panel
In Edit Mode, select, extrude, and move the vertices as required! The Shrinkwrap modifier will take care of keeping the vertices adhering to the target mesh surface.
If you are having issues, such as vertices jumping everywhere as you try to move them, try to disable the Snap tool. This is not always the case, but sometimes the combination of both the tool and the modifier can give unexpected results; other times, it can be the opposite.
Extruding and cutting an edge-loop under the Shrinkwrap modifier
Remember that if you are using this method to re-topologize, at the end of the process, you must apply the Shrinkwrap modifier.
Also, save the file.
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