SimLab iPad Exporter for Modo — Quick Setup & Export Guide

SimLab iPad Exporter for Modo: Troubleshooting Common Export Issues

Exporting Modo scenes to the SimLab iPad format is generally straightforward, but users sometimes encounter problems that block a successful export or cause issues in the exported file. This guide covers the most common problems, why they happen, and step-by-step fixes so you can get reliable iPad-ready scenes.

1. Export fails or hangs

• Cause: Large scene size, overly complex geometry, or insufficient system memory.
• Fixes:
  1. Reduce scene complexity: Remove unused geometry, hide or delete high-poly meshes, and merge duplicate objects.
  2. Triangulate heavy meshes: Convert dense N-gons where possible to reduce processing load.
  3. Increase memory headroom: Close other applications and increase Modo’s undo history limit only if needed.
  4. Export in parts: Export problematic assets separately and reassemble in SimLab Composer on desktop if supported.

2. Missing textures or incorrect material assignments

• Cause: Texture paths are absolute, textures not embedded, unsupported image formats, or materials using Modo-specific shaders.
• Fixes:
  1. Embed or copy textures: In Modo, use a consolidated export folder and ensure textures are saved there. Prefer relative paths.
  2. Use common formats: Convert textures to PNG or JPEG if using uncommon formats (e.g., PSD with layers).
  3. Bake complex shaders: Bake procedural or layered shader results into texture maps (diffuse, normal, roughness) before export.
  4. Check material assignments: Ensure each mesh has correct material IDs and no unassigned faces.

3. Incorrect scale or units on iPad

• Cause: Mismatched unit settings between Modo and the exporter or export scale override.
• Fixes:
  1. Set consistent units: In Modo Preferences and the SimLab exporter, set the same units (e.g., meters).
  2. Apply model scale: Reset transforms and apply scale to objects before exporting.
  3. Test with a reference object: Export a simple unit cube to confirm expected size on the iPad.

4. Animations not exported or play incorrectly

• Cause: Unsupported animation types (procedural, rig constraints) or export settings excluding animation.
• Fixes:
  1. Bake animations: Convert procedural or constraint-driven motion into baked keyframes.
  2. Check exporter options: Enable animation export in the SimLab exporter dialog and verify frame range.
  3. Simplify rigs: For complex rigs, export only the animated mesh/transform data needed for playback on iPad.

5. Normals and shading artifacts

• Cause: Inconsistent normals, duplicated vertices, or smoothing groups not translated.
• Fixes:
  1. Recalculate normals: In Modo, unify and recalculate normals; remove or merge duplicated vertices.
  2. Check smoothing: Convert smoothing groups to vertex normals or bake normal maps for consistency.
  3. Export with correct normal options: Ensure exporter preserves normals or includes normal maps.

6. Unsupported geometry or file features

• Cause: Features like subdivisions, deformers, or Modo-exclusive modifiers may not be supported by the exporter or iPad viewer.
• Fixes:
  1. Apply subdivisions: Convert subdivision surfaces to polygons at an appropriate level before export.
  2. Bake deformations: Apply deformers and export resulting geometry.
  3. Simplify procedural elements: Replace with baked geometry or textures.

7. High file size leading to slow load or crashes on iPad

• Cause: Very high-resolution textures, unoptimized meshes, or embedded unnecessary data.
• Fixes:
  1. Downscale textures: Use maximum texture sizes appropriate for iPad (1024–2048px commonly sufficient).
  2. Optimize meshes: Decimate where possible; remove internal faces and tiny geometry.
  3. Exclude extras: Do not embed unused layers, backup data, or large source files in the exported package.

8. Exported scene looks different on iPad (lighting, color)

• Cause: Different rendering engines, color space mismatches, or missing environment/IBL maps.
• Fixes:
  1. Bake lighting where needed: For consistent look, bake ambient occlusion or lightmaps.
  2. Use sRGB textures: Ensure color-managed textures are in sRGB if the viewer expects that space.
  3. Include environment maps: Export or embed HDR/IBL files when lighting relies on them.

Quick checklist before exporting

• Use consistent units and apply transforms.
• Consolidate textures into a single, relative folder; convert to PNG/JPEG.
• Bake procedural shaders, rig animations, and lightmaps as needed.
• Optimize meshes: remove doubles, reduce polycount, and triangulate if required.
• Test-export a small scene first to confirm settings.
• Keep texture sizes reasonable for mobile (1024–2048px).

If following these steps doesn’t fix your issue, provide the specific error message, a brief scene summary (polygons, texture sizes, animation presence), and Modo/exporter versions — I’ll suggest targeted next steps.