Of course any good tool has more to it then meets the eye. The retopology tools are no exception. You can find the menu in the top tool bar, under Retopo. Below are listed all of the functions in this menu.

Import: Import an external mesh to continue creating topology started in another 3D modeling program.
Export: Exports a retopo mesh to continue work in an external 3D application.
Export selected: Exports only the selected faces of your retopo mesh.
Export Separated Poly (Retopo) Objects: Exports each Retopo Group as a separate file. Name of each generated file will contain group name.
Save Contour for laser cutting: Exports the connected boundary of a UV island to facilitate laser or CNC cutting.
Take Mesh From Paint Room: Move mesh from the Paint room into the Retopo room. In this case the objects will be colored; color will be used in baking and merging into the scene.

Edit Scene Scale: Edit scene scale that was defined when you imported the mesh in Sculpt room and pressed “Yes”.

Select Faces Picking Method: Selects faces based on the following options: Triangles, Quadrangles, N-Gons, Stars and Improve Quad Topology.

Apply symmetry to all layers: Makes all symmetrical operations permanent for all Retopo Groups allowing them to be “Baked” into the Paint Room and “Unwrapped” in the UV Room.
Apply symmetry to current layer: Makes only the currently selected Retopo Group permanently symmetrical for Merging and Unwrapping.
Virtual mirror mode: This option is applicable only if symmetry enabled. In this mode you should create topology only on one side of symmetry. Opposite side will be shown as in mirror without actual creation of polygons. You need only work on one side of the mesh.
After you will finish you may ““Apply symmetry” to make the symmetrical topology permanent. If this mode is turned off polygons will be automatically created on both sides of the symmetry.

Working w/ Symmetry (Retopo/UVs): This video continues the Introduction to working with Symmetry; focusing on the Retopo Room and UVs).

Sculpt Mesh:
Subdivide 1, 2, 3:
Unlink Sculpt Mesh

Set Islands Min Distance: Set Islands Min Distance.
Auto unwrap attached faces: Check this option to create UV’s automatically. Auto unwrap faces that was created nearby to already unwrapped island. Unwrapping will be performed each time when you switch new tool.
Unwrap: Fit all islands onto the UV map. Isthe same command found in the “UV Tools” section of the Tool Panel.
Close holes: A very valuable option which attempts to repair holes in imported Retopo meshes - especially dense scanned meshes.
Remove N-Gons: Remove N-Gons
Clear mesh: Clears the whole mesh from the selected Retopo Group.
Subdivide: Subdivides the whole mesh, using one iteration, from the current Retopo Group.
Catmull-Clark subdivision in retopo room. Two different commands - “Subdivide selected” and “Subdivide the whole group”.
Relax: Relaxes the Retopo mesh to aid in snapping to the reference surface - for the currently selected Retopo Group.
Apply Triangulation: Triangulation all visible retopo mesh as a entire.
Apply Quadrangulation: Quadrangulation all visible retopo mesh as a entire.

Save Retopology State: Store retopology state to the separate file.
Load Retopology State: Restore retopology state from separate file.

You should understand well organization of objects in 3DCoat (Think same for Max & Maya).

- object is just set of polygons, it is independent on UV sets.
- materials are also sets of polygons, usually UV set contains several materials.
- UV-sets correspond to textures. They in general exist independently on objects.
- layers exist through all objects and UV sets.

So if you merge object in paint room from retopo room it creates 1 object, materials that correspond to polygroups and UV sets that correspond to UV sets in retopo room. Every merge retopo→paint creates this set. So objects and UV sets may be related but it is not 1:1 correspondence.

If you will do some simple retopo piece and bake you will get 1 object 1 material and 1 uv set. Better if at least UV sets will have unique names. If you will bake object from File menu it will also create additional objects, materials and UV sets.\\

Bake selected only: Bake into the Paint Room only those faces which are currently selected.
Import coarsed mesh: Bake a mesh into the Paint Room that has the number of polygons specified.
Use names correspondence for baking: Assures that only Retopo Groups bearing the same name as their Voxel Layer counterparts are Baked into the Paint Room. You may use this option to simplify Sculpt Object Baking if names of Retopo Objects correspond to Sculpt Object names. If you check the option each Retopo Object will be baked using only the Sculpt Object of same name and its children.
Correspond Retopo Object w/ Sculpt Object: This function will help find Retopo Objects that have corresponding Sculpt Objects. If there is any corresponding objects with similar names, the Retopo Object will bake only the details from the Sculpt Object with the same name.
Bake normals with dithering:

Quick Start: Retopo Baking: This video demonstrates the Retopo Baking toolset.

Normal Map Software Preset:
Initial subdivision: Set initial subdivision of the object for smoother look (if needed).
UV-mapping type: Keep original UV or choose Auto-mapping.
UV-set smoothing: This option works only if you have chosen to subdivide model during import.

Z-up coordinate system Z-up based coordinate system for compatibility with Rhino, 3DS-Max, and other applications with Z-axis up.
Import Tiles as UV sets Import separate UV tiles as separate UV sets.
Triangulate: Triangulate a mesh to avoid UV glitches.
Weld Vertices Weld separate vertices that are at the same point in space.
Invert Normals
Lock Normals Don't recalculate normals, use normals directly from the object file. If you subdivide mesh this option will be ignored.
Don't Snap Subdivision Vertices to Surface: This option helps to avoid snapping of the subdivided mesh to the surface of high-poly mesh. It makes the Layer0 mesh very smooth. All displacement (normal maps) will be placed on higher layers in this case. This option is very helpful if you want to export a low poly mesh and displacement map.
No Center Snap 3D-Coat tries to move bound box of the model to the origin of the scene by default. Check this box if you want to import model as is, without any centering.
Set sharp edges (split normals) over UV seams
Auto smoothing groups: This option allows creating smoothing groups automatically. By specifying value in the “Maximum angle” option responsible for the maximal angle between faces when the edge becomes sharp, it is necessary to activate the Auto smoothing groups option. To use this option turn the Auto smoothing groups on.

Treat Poly Groups as Paint Objects: In this mode each material of the object will be treated as separate UV set (separate texture) regardless on initial UV-sets. If you deselect “Treat Poly Groups as Paint Objects, your paint Objects or Poly Groups layers be converted to surface materials and you only now will have one paint object but with several surface materials. Rename your Paint object as it will be a combination name of all the Poly Groups layers.

UV-set name: Enter UV-set name.
Texture width: Set texture width.
Texture height: Set texture height.

• Note: If your video card has less then 2GB of Vram you should avoid textures larger than 2000 x 2000.

Bake sculpt mesh onto paint room mesh: This command will bake changes in the Sculpt room object to the Paint Room object and update the paint layers in the process. Previous paint layers will be preserved (whenever possible) while newly baked maps will be assigned new layers. This command takes paint scene object as retopo mesh and bakes details and color form Sculpt scene to paint object.

Update Paint Mesh with Retopo Mesh: This command will replace the currently visible Paint Room object(s) with visible Retopo Mesh.
It allows to update normalmap and color layers related to volumes. Pay attention that painted areas on sculpt mesh will overwrite painted areas on the paint room object. It works only for per-pixel painting approach. So be careful to avoid loosing data.
A UV-set is required, but if you have not assigned a UV-set it will be generated automatically.

Layers will be kept, but UV-s of retopo mesh should be similar to the paint room mesh. The operation is not undoable, so we recommend you to save scene before the attempt to replace geometry.

Bake with Normal Map (Per-Pixel): Bake the Retopo mesh from the currently selected Retopo Group into the Paint Room and the “Objects” Panel for texturing using the “Per-Pixel” method. Details are baked as a Normal Map on special layer. Displacement will not be baked.
A dialog is presented which allows Import Object for Per Pixel Painting.
Retopo→per pixel (no baking): Bake only the Retopo geometry without projecting details, into the Paint Room and Objects Panel for per-pixel painting.
Bake w/ Normal Map (Per Pixel) + Flat Displacement: Bake objects for per-pixel painting and bake normal map on special layers.
Displacement will be baked as flat displacement to each triangle. The layer “FlatDisplacement” will be hidden and available to export.
Bake w/ Per Pixel Painting w/ Displacement: Baking of displacement for per pixel painting may produce wrong result in some cases because per pixel painting works not well for deep displacement.

Bake with Ptex: Takes the mesh as defined in the Retopo Group for an object and Bake it into the Paint Room and “Objects” Panel, making it ready for texturing operations, using the Ptex method.
Retopo→PTEX (no baking): Bake only the outer “hull” of the Retopoed object into the Paint Room and Objects Panel for texturing using the Ptex method.

Bake Into Scene (Microvertex): Bake patch into the scene. This operation requires a UV-set. The patch will be projected (baked) onto the old mesh and the layer structure will be preserved. Readies mesh for texturing using the “Micro-Vertex” method.
Retopo→microvertex (no baking): Readies the Retopo mesh for texturing using the “Micro-Vertex” method, but uses only the “raw” form of the mesh and performs no “baking” operations. Merges the result into the Paint Room and “Objects” Panel.

Exporting a Displacement Map: A step by step video showing how to bring in a low poly UV'd object and sculpt additional details onto it, then how to bake out a displacement map and view it onto the low poly model by Industry Tuts.

Bake texture (Deprecated): Invokes the Texture Baking Tool, which allows you to bake the Diffuse, Specular, Normal and Displacement textures which have been already applied to your “Baked” Retopo mesh onto a similar, external polygonal mesh file.

Baking To a Flat Plane

Texture Baking Tools: This old video demonstration covers a few texture baking improvements/additions as of 3DCoat V4 (currently outdated).

Texture Baking: This video begins the demonstration of the Texture Baking process in 3DCoat. Explaining in general terms, how the process typically works, including Sequential Texture Baking.

Bake Settings Dialog Old Version for V4: This video continues the demonstration of the Texture Baking/Merging to Paint Room process. It covers the “Bake Scan Settings” dialog in detail, where to find the “Happy Baking Guide” pdf and clearing the Paint Room (in order to prevent duplicate meshes and paint layers) when re-attempting a bake.
EDIT: As of build 4.0.10, there is no longer the need to exit the Bake Settings Dialog, to switch UV maps when applying local “Zones” to the model.

  • general/retopo_workspace/retopo_menu.txt
  • Last modified: 2022/07/26 22:21
  • by carlosan