1. Declare What You Are Selling
Identify the manufacturer, exact model and variant, package version, creator, tested LPP versions and intended use. List every included component and movement. Distinguish mesh, exact CAD, 2D drawing and reference imagery.
| Declared model class | Required evidence | Claims not permitted |
|---|---|---|
| Visual / training model | Accurate screenshots, declared approximations and tested display performance. | Factory accuracy, verified mass or rated capacity without evidence. |
| Dimensioned reference model | Source document, edition and page for each claimed dimension; source-versus-model comparison and known tolerances. | Treating transport envelopes as pin centres or nominal lengths as measured geometry. |
| Rigged / parametric model | Repeatable movement and dimension tests, joint and rope review, supported configurations and parameter limits. | Calling animation proof of safe operation or of a valid load chart. |
These are declaration categories for review, not automatic verification badges. Unfinished calibration studies must be labelled as such; they must not be sold as fully verified manufacturer machines.
2. Package and File Hygiene
- Deliver a ZIP containing a working LPP model/project, its required dependencies, a README, buyer licence, source register and test evidence. Give the package a stable name, for example
creator-lr1300-reference-v1.0.zip. - The current uploader accepts a ZIP up to 512 MiB (536,870,912 bytes). A preview may be JPG, PNG or WebP up to 12 MiB (12,582,912 bytes). Do not disguise another format with a ZIP extension.
- Use relative, portable asset paths. Include GLTF buffers and all texture dependencies, or embed them in GLB. Do not depend on files in the creator's personal folders, private URLs or expiring download links.
- Include a file inventory and SHA-256 checksums for the deliverable files. State both archive size and unpacked size. Keep credentials, personal customer information, account tokens, activation keys and unrelated files out of the package.
- No executables, scripts, macros, nested archive chains, encrypted payloads, absolute paths, parent-directory traversal or links escaping the package. Include only assets required by the model.
- Open a clean copy after extraction in an isolated review location. Automated upload acceptance does not certify ZIP contents, geometry, malware status or engineering suitability.
3. Units, Geometry and Organisation
- Declare source units, canonical units, conversion factor and up axis. LPP 3D scene coordinates use metres and Y-up. Preserve important site origins; document any centring or axis conversion. Verify a known dimension after import and after reopening.
- Keep carbody/chassis, left and right tracks or axle groups, upperworks, cab, boom sections, mast, counterweights, winches, sheaves, hook and supports independently selectable where present. Do not merge a whole crane into one mesh.
- Use clear, stable names, unique IDs and meaningful layers/groups. Example:
CRANE/BOOM/INSERT_03M_01. State left/right and front/rear relative to the machine. - Remove duplicate hidden copies, degenerate faces, invalid indices, inverted normals and unintended intersections. Thin plates may be open surfaces only when intentional and declared. Do not label a mesh as an exact B-Rep solid.
- Inspect the delivered model in plan, side, front and isometric views, including joints, cab interior, sheaves and hook. All reference lines and annotation layers must be named and switchable.
4. Rigging and Parametric Behaviour
| System | Submission check |
|---|---|
| Slew and luff | Correct local pivot and axis; fixed chassis/carbody remains fixed; supported angular limits documented. Repeated travel must not accumulate drift. |
| Lattice or telescopic boom | Separate sections, correct order and overlap or pinned joints, bounded dimensions and explicit supported combinations. Do not stretch a manufactured insert to claim another section size. |
| Mast, pendants and cylinders | Pinned ends remain connected throughout the tested range. Cylinder engagement and stroke limits are checked. Pendant length does not change merely to hide a broken linkage. |
| Hoist, hook and reeving | Rope route identifies drum, guides, head sheaves, hook sheaves and termination. Part-of-line count matches the shown route. Hook payout, drum rotation and sheave alignment remain coherent; no rope through solid geometry. |
| Tracks, outriggers and mats | Separate stowed/deployed supports where claimed. Ground mats are separate from outrigger feet, with adjustable dimensions and stated assumptions. Geometry alone must not produce a certified bearing capacity. |
| Parametric parts | Units and ranges for every control; finite geometry at minimum, nominal and maximum values; mating points follow edits; copies remain independent; save/reopen preserves parameters and material choices. |
| Load and tackle | Actual contact/connection points, leg count, angles and any hitch represented correctly. Separate documented load, hook, rigging and beam weights. Manufacturer WLL/configuration evidence must match the exact equipment, not a visually similar item. |
Record the exact tested poses. Test return to the starting pose, combined slew/luff/hoist, dimension changes and reopening. Where a manufacturer's document does not give a pin centre, tube profile or internal mechanism, mark it as a modelling assumption.
5. Manufacturer Data and Engineering Claims
- For every source: title, manufacturer, model/variant, edition/date, page/table, official link, retrieval date and file hash where available. Explain whether the PDF is included with permission or linked only.
- Keep nominal length, overall transport size, section-centre geometry, operating configuration and site coordinates distinct. Show which dimensions match their source and which are estimates or have been edited.
- State mass conditions: bare part or fitted assembly, included pendants/winch/rope, hook and accessories, ballast and contents. Do not transfer a published assembly mass to a simplified mesh automatically.
- A capacity chart must be traceable to the precise boom, ballast, support, reeving and operating configuration. Do not invent capacities, extrapolate beyond a table or use the crane's nominal maximum tonnage as its capacity at a chosen radius.
- Missing duties or unknown engineering data must remain visibly unavailable. A visual model may be acceptable with clear limitations; unsupported safety-critical claims are not.
- Include a discrepancy register: item, source value, model value, assumption, reason, required evidence and review status. Identify who checked the data and when. LPP review does not replace the equipment owner's documents or competent lift planning.
6. Materials, Performance and Compatibility
- Textures must load from the package. Inspect UVs, normal orientation, transparency, glass and metal under neutral lighting. Keep paint editable without losing source markings. Identify manufacturer marks without implying endorsement.
- Previews must show the actual deliverable, not a different crane or a promotional render that conceals defects. Supply plan, side, front and isometric screenshots plus useful close-ups.
- Report model/texture sizes, triangle count, component count and measured open/interaction performance on the named test device and LPP version. Provide reduced-detail options where needed; there is no universal approved polygon or frame-rate threshold.
- Test intended cloud and desktop workflows separately. State online-only references and unavailable mobile editing. Do not claim offline support or an operating system that was not tested.
- Include a short, unhurried movement recording and a parameter demonstration. Show motion limits, support deployment where relevant, and a save/reopen check. Video supplements, but does not replace, the working package.
7. Rights, Licence and Listing Accuracy
- Submit only original work or files you have permission to distribute commercially. Public availability of a manufacturer PDF or mesh does not itself grant redistribution rights.
- Provide rights evidence for source models, textures, drawings and other third-party material. Purchased LPP packages may not be relisted as the creator's own work.
- The buyer licence must identify permitted use, seats/users, derivative work, redistribution restrictions, updates and support. Make the exact included files, compatibility and limitations clear before purchase.
- Free submission is not a sale, payout or approval. Existing seller terms, Stripe eligibility and published pricing govern earnings; this standard does not change the agreed fee split or promise sales.
8. Review and Release Gate
Draft → Submitted → Review → Changes requested or Published. No publication merely because an upload succeeds.
| Gate | Evidence the reviewer records |
|---|---|
| Package integrity | Exact version/hash, inventory, dependency checks and extraction/open results. |
| Visual and structural organisation | Actual model views, named/separable parts, units and known-dimension check. |
| Rig and parameter tests | Test poses, ranges, attachment checks, reopened model and identified limitations. |
| Source traceability | Document register, dimensional comparisons, mass conditions and unresolved assumptions. |
| Rights and listing | Commercial permission, buyer licence, accurate previews/claims and compatibility. |
| Release decision | Reviewer, date, package revision, passed/failed items, feedback and final approval. |
Request changes for missing dependencies, misleading accuracy/rating claims, broken attachments, geometry outside stated tolerances, unresolved rights or incomplete compatibility evidence. Re-review any package change. Keep the previous reviewed package and its evidence for traceability; do not quietly replace the files behind an existing version.