Model, sculpt, remesh, unwrap, paint, create colliders, and export 3D props directly inside Unity. A fast, focused toolkit for creating and modifying game-ready assets.Authored and tested in URP. The tools themselves are pipeline-independent. On Built-in or HDRP, run Tools - Kelpo - 3D Multitool - Adapt Demo Materials to convert the included demo materials (a Built-in materials package is also included). Painting and export follow Standard, URP/Lit, and HDRP/Lit map conventions. Custom pipelines aren't supported yet.Kelpo 3D Multitool gives you a focused set of 3D creation and editing tools built directly into Unity. Create weapons, environment pieces, and game props from scratch, or give existing assets a new look with layered PBR painting. Model, sculpt, simplify or remesh topology, generate UVs, paint directly onto the surface, create custom collision meshes, and export finished prefabs. See how your assets fit into your game as you work, without switching to an external 3D application.Documentation and tutorials | Website | YouTubePaint from a blank canvas or start from existing albedo and metallic/smoothness textures. Skinned meshes can be unwrapped and painted in their current pose, and their materials and textures exported, without touching the rig or topology.Kelpo grew out of a simple need: spending less time moving between applications for everyday 3D tasks. It focuses on essential tools and quick iteration inside Unity.Best use cases:Creating game-ready props, weapons, shields, furniture, and environment assets directly inside UnityTaking assets from initial shape through sculpting, UVs, PBR painting, colliders, and prefab export in one workflowCreating visual variations of existing assets with new colors, material finishes, painted wear, and surface detailsBuilding modular environment pieces and custom geometry that fit your sceneAdapting imported static meshes to your project while preserving their original shadingPainting character and creature variations on skinned meshes in their current poseRapid prototyping, blockouts, and turning early ideas into finished assetsBuild custom collision meshes for complex assets, with direct control over their shape and detail so collision follows the parts that matter for gameplayKeep in mind:This isn't meant to replace full digital content creation suites like Blender. It doesn’t feature advanced boolean workflows, polygon-by-polygon manual retopology, or a complete UV editing environment. Kelpo’s Retopo workflow instead provides preservation-guided automatic simplification and adaptive remeshing.Modeling, sculpting, and remeshing work on static meshes; skinned meshes support UV generation, current-pose painting, and texture export, but not topology editing, because that would require skin-weight rebinding that Kelpo doesn't perform. On multi-material objects, each paint session targets one selected material slot. Other slots remain unchanged; start a separate session to paint another slot.FeaturesModeling & sculptingPolygon modeling with vertex, edge, and face editingExtrude, inset, connect, weld, loop selection, loop cut, and live mirroringSculpting with a practical core brush setAdaptive remeshing, subdivision, and weighted mesh simplificationPreservation-mask painting for protected details during simplificationPainting & UVsAutomatic non-overlapping UV unwrappingBox and triplanar-style UV projectionPBR surface painting with albedo, metallic, smoothness, and height-to-normalPaint texture resolution: up to 2048 × 2048 pixels per material slot - 2K maximumMultiple paint layers, brush tips, spacing, opacity/flow, stamps, and tablet pressure when reported by UnitySaved face selections and Height-channel brush limits for targeted paintingHeight-driven layer masks for carved areas, raised details, edges, and cavitiesPainting over existing albedo and metallic/smoothness texturesSkinned mesh UV generation, current-pose painting, and texture exportSkin weights, bind poses, blendshapes, and secondary UV channels preserved during supported UV operationsColliders & exportQuick collider creation and simplified MeshCollider generationMesh, texture, material, and prefab export workflowsPainting and export support URP/Built-in MetallicGloss and HDRP MaskMap conventionsCompatibility & workflowCustomizable modeling shortcuts stored in project settingsWorks entirely inside the Unity EditorMinimum Unity version: Unity 2022.3 LTSTested with Unity 2022.3 LTS, Unity 6.4, and Unity 6.5Render pipelines: URP Lit, Built-in Standard, and HDRP LitURP is the primary presentation pipeline; demo and sample materials can be adapted to the active pipeline in one clickCustom shaders require compatible material-property conventionsSupported OS: WindowsDocumentation, demo scene, and sample assets includedThe tool's code was written with the assistance of Claude (Anthropic) and OpenAI Codex. I designed the toolset, features and workflows, directed the implementation, and performed final verification in Unity. AI-assisted code audits and automated tests were also used during development. AI assistance was also used to draft, edit, and review the included documentation. No AI-generated art, audio or other content assets are included.
