How to prepare sculpt files for high-detail resin printing

Q: Is LunarWerx 3D Print free to use?

Yes, the tools are free to use. You use them on the website, which is hosted on Cloudflare. Signing in lets your settings, recent test plates and print results follow you to every computer. The code package is marked private, not public.

A step-by-step guide for art sculptors preparing sculpt files for high-detail resin printing, with tools to consider and mistakes to avoid.

By TexHouse · 2026-10-24

TexHouse is published by the makers of LunarWerx 3D Print, Vector3D and MeshyDL, which are compared here alongside other tools.

To prepare a sculpt file for high-detail resin printing, export it at full detail as a mesh file, confirm its size in millimetres, check the mesh for holes and flipped faces, hollow the thick areas, add drain holes, and orient and support the piece before you slice.

Option	What it does	Fee
LunarWerx 3D Print	Browser tools that turn right side out STL faces that point backwards ^[1]	Free to use ^[1]
Other tools you compare	Check each tool's page for the file formats and resin settings it covers	Not published

What you need before you start

Before you start, have the sculpt in a mesh file, which is the common shape format that 3D printing software reads. Most modelling programs can export one, and the export should keep every fine detail you want on the finished piece, such as eyelids, knuckles and cloth folds.

Know the size you want the finished piece to be in millimetres. A sculpt exported without units can print far too large or far too small.

Keep the manual for your resin printer nearby, since it lists the pixel size, the minimum wall thickness and the layer height the machine handles. A mesh checker, which can be a desktop program or a browser tool, helps you find holes and flipped faces.

Finally, set aside time to look at the file on screen from several angles. Problems that are easy to miss in a quick render often show up once the file is zoomed in.

Step by step

Export at full detail. Save the sculpt as a mesh file from your modelling program, and set the export to the finest resolution it offers.
Set the size. Confirm the height in millimetres, scale the model to the finished size you want, and write the final dimensions down for later.
Check the mesh. Look for holes, flipped faces and loose pieces with a mesh checker, and fix each one before you go further.
Remove only what the printer cannot show. Smooth out tiny noise, but leave the detail your resin printer can resolve, such as fingers, facial lines and surface texture.
Hollow the thick areas. Thick solid sections use more resin and can trap pressure, so hollow them and leave a wall at least as thick as the minimum in your printer manual.
Add drain holes. Place small holes at the lowest points of every hollow section so uncured resin can drain out after printing.
Orient the piece. Tilt the sculpt so the most detailed faces are not pressed flat against the build plate, and keep the tallest part of the print in mind.
Place supports. Add supports under overhangs, and check that their tips sit on hidden or flat areas rather than on faces you want to show.
Slice and preview. Load the file into the slicing software for your printer, step through the layers, and look for thin walls or floating areas.
Print a small test. Print a small section of the sculpt first, and check the detail and the drain holes before committing to the full piece.

Tools that can do it

Several tools can help with parts of this job. The tools here are options. This page has no published facts about other tools, so check each tool's page for the file formats, resin settings and fees it lists.

LunarWerx 3D Print is made by the team that publishes this site. It is a set of browser tools that work out ironing settings for your printer, check a part for injection moulding and design 3D-printable foam inserts. ^[1] It runs in a web browser. ^[1] You use it on its website, which is hosted on Cloudflare. ^[1]

When you open an STL file with faces turned backwards, it turns them right side out and says how many it fixed. ^[1]

For packing finished pieces, it lays parts out in a box and designs a 3D-printable foam tray and top pad that each part lifts straight out of. ^[1] The foam insert is split into pieces that each fit your printer's bed. ^[1]

It runs only in your browser, and signing in lets your settings follow you to every computer. ^[1] The tools are free to use. ^[1] Resin exposure settings are not part of those features, so check your printer's own software for them.

Common mistakes to avoid

Skipping the scale check is a common mistake. A sculpt that prints at the wrong size wastes resin and time, so confirm the size before any other step.

Leaving flipped faces in place can make the slicer misread solid areas and can leave holes in the print. Run a mesh check every time you export the file again.

Keeping every surface solid uses more resin, makes the print heavier and can trap pressure inside the part. Hollow the thick areas and always add drain holes.

Placing supports on the faces you want to show is another mistake. Move the support tips to hidden or flat areas, and check them in the preview.

Printing the whole sculpt before a test is costly. A small test piece shows whether the detail and drain holes work, and it can save a full print if something is wrong.

Frequently asked questions

How do you check a sculpt file for flipped faces before resin printing?

Load the mesh into a mesh checker and look for holes, loose pieces and faces that point the wrong way. LunarWerx 3D Print can fix STL files with faces turned backwards, turning them right side out and reporting how many it fixed. ^[1] Run the check again after every export, because one flipped face can leave a hole in the finished print. Then preview the layers in your slicer before you print.

What scale should an art sculpt file be exported at for resin printing?

Export the sculpt at the finished size you want, measured in millimetres, and check the height before you slice. A file exported without units can open far too large or far too small, so confirm the figure against the size you planned. Note the final height, width and depth, because your printer's build area limits how large one piece can be. If the sculpt is too tall for one print, split it into parts and join them after printing.

Can LunarWerx 3D Print repair STL files for sculpt printing?

It turns right side out any faces in an STL file that point backwards, and it says how many it fixed. ^[1] It runs in a web browser. ^[1] Its features on this page cover file repair and packing, and resin exposure settings are not among them. For holes, loose pieces and thin walls, a mesh checker and the steps above still apply.

Is LunarWerx 3D Print free to use?

Yes, the tools are free to use. ^[1] You use them on the website, which is hosted on Cloudflare. ^[1] Signing in lets your settings, recent test plates and print results follow you to every computer. ^[1] The code package is marked private, not public. ^[1]

How do you hollow a resin sculpt before printing?

Hollowing removes the solid core of a thick section, so less resin is used and the part is lighter. Leave a wall at least as thick as the minimum your printer manual gives, and place drain holes at the lowest points so uncured resin can escape. Check the hollow shell in your slicer preview before printing, because a thin or sealed area can trap pressure and crack during the print. Test a small section first when the sculpt has a new wall design.

The tools are free to use. ^[1]

Try LunarWerx 3D Print

Sources

LunarWerx 3D Print's own description of itself (the product of this site's publisher)