Blender for Trainz

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Sculpt

Blender has its own sculpt mode. Clicking on the 3D Editor’s Mode Selection Icon

and selecting Sculpt Mode bring up its own set of tools in the Tool Shelf.

Panes include Brush, Texture, Stroke, Curve and Dyntopo. “Dyntopo” – what the… ?

Actually, Sculpt Mode is very similar to Edit Mode in that it is used to shape a

model. But, instead of altering the position of individual vertices, edges and faces,

in Sculpt Mode an area of the model is altered using a “brush”, of which there are

several types to choose from.

To use Sculpt Mode the model has to have a substantial geometry (number of faces)

to alter, so what you are really doing is creating a detailed mesh.

Five levels of subdivide added with the Multiresolution Modifier turns the Default

Cube in to a sphere, seen here in Wireframe Mode.

This still works for creating low-poly models for Trainz because there are ways to

convert the detailed mesh into a low-poly mesh.

One is to use a Multiresolution Modifier with increased levels of subdivision (e.g., 5

or 6) to sculpt the high-poly mesh then baking the high-poly mesh to a low-ploy

mesh. The technique is elegantly demonstrated in this Zero Brush tutorial (Simple

Game Assets Zero Brush).

Using Sculpt Mode and a Multi-Resolution Modifier in Zero Brush, this high-poly mesh

(98,305 faces) was baked onto this low-poly mesh (97 faces) to create this rock

(Simple Game Assets Zero Brush).

Another method of converting a high-poly mesh to a low-poly is to use a the

Shrinkwrap Modifier. This technique is neatly demonstrated in Darrin Lile’s series of

tutorials on Blender Character Retopology.

 

Last updated: December 19, 2015

 

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Five levels of subdivide added with the Multiresolution Modifier turns the Default

Cube in to a sphere, seen here in Wireframe Mode.

 

Click on image to

enlarge

 

Retopology with the Shrinkwrap Modifier is used to make a low-poly mesh from

the high-poly mesh. Then, a normal map of the high-poly mesh is baked onto the

low-poly mesh (Darrin Lile, Blender Character: Retopology, Character UV Mapping

and Character Baking Normal Maps).