ZBrush Decimation and Export

Question 1

What is the primary purpose of Decimation Master in ZBrush?

Accepted Answer

To reduce the polygon count of a high-poly ZBrush mesh while preserving visual detail for rendering or 3D printing

Answer

To generate game-ready quad topology via ZRemesher

Answer

To merge all SubTools into a single decimated mesh for export

Answer

To apply a subdivision level reduction across the entire ZTool

Question 2

What does the 'Preprocess Current' button in Decimation Master do?

Accepted Answer

Analyzes the active SubTool's surface to calculate optimal decimation weights for a subsequent Decimate Current operation

Answer

Applies one round of ZRemesher to reduce polygon count before decimation

Answer

Removes all subdivision levels above level 1 to prepare for export

Answer

Runs a topology analysis and assigns polygroups based on surface curvature

Question 3

What is the difference between OBJ and GoZ export in ZBrush?

Accepted Answer

OBJ exports only the active SubTool; GoZ exports all visible SubTools simultaneously with topology, UVs, maps, and a direct bridge to the target DCC

Answer

OBJ includes rig data; GoZ exports geometry only

Answer

GoZ is a ZBrush-specific binary format; OBJ is for 3D printing only

Answer

There is no practical difference — both produce the same file output

Question 4

What file format should you choose when exporting a ZBrush sculpt for 3D printing that requires watertight geometry?

Accepted Answer

STL

Answer

OBJ

Answer

FBX

Answer

ABC (Alembic)

Question 5

How does ZBrush's Decimation Master differ from ZRemesher in its output and use case?

Accepted Answer

Decimation Master produces optimized triangles preserving visual detail; ZRemesher produces clean quad topology for animation and rigging

Answer

Decimation Master produces quads; ZRemesher produces triangles

Answer

Both produce identical triangle meshes; they differ only in processing speed

Answer

Decimation Master adds subdivision levels; ZRemesher reduces them

Question 6

What does enabling 'Mrg' (Merge) in ZBrush's OBJ export settings do?

Accepted Answer

Welds duplicate border vertices to create a watertight mesh

Answer

Merges all subdivision levels into a single polygon mesh

Answer

Merges all visible SubTools into one OBJ file during export

Answer

Combines UV islands into a single atlas before export