Render ZBrush jewelry sculpts online

The main challenge is size

Sculpts often contain millions of polygons, far more than a render needs. A raw export can be hundreds of megabytes and slow to open. The good news is that decimation keeps the visual detail while removing most of the polygons, and a decimated sculpt usually looks identical in a jewelry render.

Files can be up to 100 MB for OBJ and STL, and 200 MB for FBX. Aim well below that for a smooth studio experience.

Decimate before exporting

ZBrush's Decimation Master reduces polygon count while preserving surface detail. A practical approach:

1. Duplicate the SubTool so the original stays untouched.
2. Pre-process the copy in Decimation Master.
3. Decimate to a level that keeps the details you care about, often a few hundred thousand polygons for a ring or pendant.
4. Compare the decimated copy with the original at close range before exporting.

Choosing an export format

STL arrives as a single part. OBJ and FBX can keep separate named parts, which matters when your design combines a sculpted metal body with set stones. Name stone parts with words such as Diamond, Gem or Stone so the studio gives them gem materials automatically. See the OBJ format page and the FBX format page.

Sculpt plus stones

Many ZBrush jewellers sculpt the metal and add stones or settings in a CAD tool afterwards. Either way, the cleanest result comes from keeping stones as separate objects with clear names. If the stones are merged into the sculpt, the studio renders them as metal, and the piece loses its sparkle.

From ZBrush to finished images

1. Decimate a copy of each SubTool you need.
2. Export as OBJ, or FBX for several named parts in one file.
3. Upload the file to your library. A preview is created automatically.
4. Open it in the studio and check that stones have gem materials.
5. Choose a metal that suits organic designs, such as a matt or sand yellow gold or a brushed white gold, which keep reflections soft so the sculpted surface reads.
6. Light it with an environment that brings out the surface detail, then pose and export.

Materials that suit sculpted work

Organic pieces often look best with softer finishes, because a mirror polish reflects so much that it can hide sculpted detail. The metal library includes matt, sand and brushed finishes in yellow, white and rose gold, alongside polished alloys, silver and bronze. These presets change the gloss of the metal, while the texture itself comes from your sculpt, which is why a careful decimation matters. Rotate the lighting until a highlight rakes across the surface. That is what makes sculpted detail visible in a photo.

Rendering in ZBrush compared with RenderMyJewels

ZBrush has its own rendering and material tools, which are great for previews and concept art. RenderMyJewels adds what product images need: physically based jewelry metals and gemstones, lighting environments designed for jewelry, marketplace backgrounds, consistent poses, still export sizes up to 8K, 360° video and AI photoshoots on models.

Tips for ZBrush users

• Keep a render export separate from your print export, with the render version decimated.
• Use FBX when you need several named SubTools in one upload.
• Check normals after decimation, because flipped faces show as dark patches.
• Name files with the SKU first so uploads organise themselves.