Hollow Heroes: Mastering Supports & Resin Efficiency in Lychee Slicer

Why Lychee Slicer Is a Resin Warrior’s Best Friend

Owning an Elegoo Saturn, Anycubic Photon, or similar resin printer means you’ve already taken the leap into mind-blowing detail and print quality. The next leap is harnessing the power of Lychee Slicer to properly support and hollow your masterpieces so they emerge perfectly, consume less resin, and avoid print failures. Whether you’re prepping detailed minis from Premium STL Masterpieces or stylized statues from the Ultimate Anime Waifu Collection, Lychee’s toolkit can deliver pro-tier results when used thoughtfully.

Prepping the Model: Inspection, Repair, and Orientation

1. Import and Inspect

Drag your STL into Lychee and immediately click the “Repair” function. Resin processes are unforgiving; small mesh errors can introduce leaks or unsupported islands once the print begins. The repaired model becomes your stable foundation for every subsequent tweak.

2. Orientation Matters

Before touching supports or hollowing, rotate the model until the largest surfaces are angled upward and downward at roughly 30–45 degrees relative to the build plate. This reduces suction forces, prevents large flat cross-sections, and ensures a more predictable layer cascade. Illustrated surfaces—like cloaks, faces, or weapon blades—should avoid flat, parallel alignment to the platform because they can create elephant-foot artifacts or require excessive supports.

Hollowing in Lychee Slicer: Saving Resin Without Sacrificing Strength

3. Activate Hollow Mode

With the model oriented, navigate to Lychee’s hollow tool. Choosing a shell thickness between 2.5 mm and 3 mm is ideal for most character sculpts because it maintains rigidity while staying economical. If you’re printing larger busts or mechanical parts that require more durability, consider 3.5 mm walls.

4. Add Custom Drain Holes

After hollowing, you must give uncured resin an exit path. Strategically place at least two drain holes—one near the “lowest” point of the print and one near the “highest” point—but on surfaces that won’t be front and center. Lychee’s hole tool lets you specify diameter (common values: 3–5 mm). When in doubt, opt for slightly larger holes, especially on bulky prints, to promote efficient drainage and reduce the risk of resin pooling.

5. Internal Lattice or Bracing

If the model is delicate or features wide surfaces, add internal bracing using Lychee’s infill patterns. A low-density grid stabilizes the shell during printing and post-processing. Place small lattice beams in broad areas like capes or smooth armor panels to prevent warping.

Support Strategy: Building a Reliable Forest

6. Understand Lychee’s Support Types

Lychee provides a spectrum of support presets—light, medium, heavy, and custom—to accommodate every geometry. Light supports are ideal for fine details such as fingertips or hair tips, while medium supports handle broader surfaces. Heavy supports should anchor the heaviest overhangs or provide lift on base sections that need to be rock-solid.

7. Build a Solid Base of Touchpoints

Activate the “raft” or “plate” if you’re printing multiple miniatures; it simplifies removal and aligns supports. For single hero models, a carefully placed array of medium supports forming a slight V-shape under the base keeps the print centered and balanced. Space touchpoints 3–5 mm apart to avoid creating weak sections that can wobble mid-print.

8. Chasing Islands and Hidden Overhangs

Use Lychee’s layer-by-layer preview to identify islands—those isolated voxels that appear before any support reaches them. When you spot one, add a light support directly beneath it. Pay special attention to hollow interiors; shifting from a solid to a hollow shell can introduce new island formations on the inner walls. Toggle between interior and exterior views to catch them all.

9. Customize Tip Shapes and Diameters

Avoid a one-size-fits-all approach. For example, a 0.25 mm tip with a 1 mm shaft might suffice for claws or hair strands, but thicker structures like shields benefit from a 0.35 mm tip and 1.2 mm shaft. Lychee allows you to fine-tune these parameters per support group, ensuring you dial in precise anchoring without leaving deep marks after removal.

Balancing Hollowed Walls and Support Placement

10. Reinforce Hollow Sections

Where the model’s wall thickness might flex—such as large, hollow torsos—place supportive columns that bridge the shell to the interior surfaces. This not only prevents warping but also distributes suction forces across more contact points, reducing stress on hydrodynamic pockets that form during peeling.

11. Integrate Venting with Supports

Use drain holes as dual-purpose anchors by extending a medium support from the hole’s interior edge to a stable point. This method protects the hole’s rim from distortion and keeps the interior surfaces from bending inward as resin exits. It’s especially helpful on large bases where open cavities can collapse under vacuum pressure.

Fine-Tuning for Different Resin Profiles

12. Photopolymer Variations and Burn-in Layers

Different resins behave differently. Flexible or ABS-like resins demand more robust supports because they exert higher peel forces, while brittle resins may require fewer but strategically placed supports to minimize stress points. Adjust burn-in layers in your printer settings to ensure supports and rafts cure fully before the main body prints. If burn-in times are too low, supports can detach even if they appear perfectly placed in Lychee.

13. Ambient Conditions and Resin Temperature

A warm resin vat helps reduce viscosity and peel stress. Keep your resin between 22–28°C (72–82°F) during printing. If the workshop dips below that, warm the resin tray gently before slicing. Lower viscosity means supports undergo less stretching, so you can use lighter tips without fear of failure, ultimately reducing cleanup time.

Smart Workflow for Multiple Models

14. Batch Preparation

When preparing several figures, rely on Lychee’s grouping and duplication tools. Create one well-supported, properly hollowed hero, then duplicate it. Though each copy retains the support tree, you should still inspect every duplicate for potential conflicts or overlapping supports once they’re positioned on the build plate. Slightly stagger models to optimize resin flow and prevent suction synchronization, which can stress your peeling mechanism.

15. Slicer Profiles and Iteration

Save multiple Lychee project files based on print size or resin type. For instance, maintain a “Miniatures Light Resin” profile for 32 mm characters and a “Large Bust ABS-Like” profile for heavier duty prints. Each profile stores hollow thickness, drain hole placement, and support tuning tailored to your go-to STLs.

Finishing Touches: Post-Processing Success Starts in the Slicer

16. Plan for Easy Support Removal

Set support contact depth to be shallow enough that they snap off after a short IPA soak, but not so shallow that they fail mid-print. For facial features or smooth armor, orient supports so they attach to hidden zones like hairline edges or underside surfaces. This approach can drastically reduce sanding and preserve sculpted detail.

17. Test and Iterate

Chances are you’ll perfect your process by reviewing failed prints as valuable data. Lychee’s scene snapshots let you record orientation, hollow parameters, and support configurations. Each iteration sharpens your instincts, enabling you to quickly diagnose whether a failure stemmed from insufficient hollow thickness, poor drainage, or oversparse supports.

Conclusion: Confidence in Every Resin Pour

Mastering how to properly support and hollow 3D print models in Lychee Slicer transforms the printing experience from guesswork into confident artistry. You’ll protect your investment in resin, preserve model detail, and drastically reduce cleanup time. With a disciplined workflow—repair, orient, hollow, drain, support, and inspect—you’ll witness stable, high-fidelity prints emerge from printers like the Elegoo Saturn or Anycubic Photon with consistency. The joy of seeing finely tuned supports peel away to reveal pristine details is why we fell in love with resin printing in the first place. Now, every step in Lychee can reinforce that satisfaction.