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FREQUENTLY ASKED QUESTIONS

Choosing 3D Models

If you can’t find the model you want, you can commission us for a bespoke 3D model at [email protected]  Simply fill up the form at our Contact Us page with details about your project and our team will be in touch as soon as possible. 

If you have any questions regarding files, formats, price, details or any other model-related issue, fill up the form here. Our team will respond within 24-48 hours. 

Yes, you can find free 3D models on XO3D (https://shop.xo3d.co.uk/3d-models/).  Just use the ‘Free‘ filter in the search. 

Payments and Downloads

If you are ready to make the purchase, you can choose between 3 payment methods: 

  • Credit card (all major credit cards) 
  • Bank payment 
  • Gpay 
  • Paypal 

Payments are processed through Stripe. 

VAT, commonly known as sales tax, is a tax imposed on the final customer at the moment of sale and paid to the buyer’s country’s government. If the tax laws of your nation apply to XO3D, we are required by law to charge you according to your country of residence (tax rate might be different depending on the country). At the checkout page, the tax will be added to your cart. 

Please notify our Support by writing to [email protected] or filling out this form if you suspect there was an error while applying the tax for you. We will do our best to investigate and advise. 

After making a purchase, the buyer receives immediate access to all available file formats.

Every product page displays the available file formats (example below):

Technical Support

  • Low Poly models  

A polygon mesh in 3D computer graphics with a small amount of polygons (as determined by an object’s wireframe and polygon density). This usually entails designing the model in such a way that it can be used efficiently. Low poly meshes are employed in real-time applications (such as gaming), whereas high poly meshes are used in animated films and 3D visualization. It also depends on how the model is used; AAA games can manage millions of polygons, whilst mobile devices may struggle with just a few hundred. A character dressed in AAA game clothing may be worth $100,000. A VR avatar could have up to 70k polygons. Simple props can have tens of thousands of polygons. Large low-poly cities can have millions of polygons. Because technology is always evolving, the boundaries may shift over time. 

Here are some pointers for making low poly/game-ready models: 

  • If the character has hair, it should be created as a polygonal mesh (for example, hair cards) rather than a hair (particle) system. Obviously, there are exceptions (e.g. Unreal strand-based hair in .abc format) 
  • When not in use, it is better if the textures are pbr and do not exceed 4k. 
  • Because certain engines lack native support for two-sided shaders, single-sided planes should have thickness. 

 

  • Rigged 

A model is deemed rigged if it: 

  • A logical hierarchy (FK/IK) must be followed by skeleton bones and joints. Object parenting and precise pivots/control nulls are required in hard-surface model rigs. 
  • Skinning and weighting must be done correctly (simple model deformations must work as expected) 
  • Morphs (blend shapes) must be properly put up. 
  • Controls should be supplied, and limitations should be properly set up. 
  • A frame for binding should be incorporated. 
  • Transforms should be reset or frozen. 
  • PBR (Physically based rendering)  

This is more precise and consistent under all lighting circumstances since it is based on real-world values. It’s the engine that drives AAA video games and high-end renderers. 

 

When generating a PBR model, the most common workflows are Specular/Glossiness and Metallic/Roughness. All core spec/gloss or metal/rough workflow textures must be provided for the model to be approved as PBR in our Marketplace. 

 

  • UV mapping  

This is the process of projecting a 2D picture onto the surface of a 3D model for texture mapping. If your model only has basic UV mapping, you can simply pick UV mapping and leave the Unwrapped UVs option blank. You must indicate a more complex mapping if one was used. You can choose between overlapping, non-overlapping, and mixed patterns. This means that the model may have basic UVs as well as unwrapped UVs or no UVs at all. 

 

  • Animated 

A model is deemed animated if it can: 

  • There are keyframes and animation curves. 
  • During playback, there are no glitches, hiccups, or unexpected spikes. 
  • The looping animation features a smooth transition. 

A model made up of polygon faces is called a polygonal mesh. 

 

Most common mesh formats: .obj,.fbx,.3ds,.dae,.stl,.max,.ma,.mb,.c4d,.blend,.lws,.lwo,.lw,.abc,.hrc,.xsi,.lxo,.lxl,.ztl,.pp2,.3b,.spp,.duf,.mud,.tb,. 

 

3ds Max, Maya, C4D, Blender, Modo, Lightwave, Zbrush, Unity, UE4, Sketchup, Softimage, DAZ Studio, Poser, and others are some of the most common tools that support mesh type. 

 

We do not advocate converting or importing solid nurbs formats into any of the software listed above. Imported solid models will have a large polycount, will be triangulated, and may have flaws like geometry cracks or inverted normals. 

 

Splines are used to create solid (CAD/NURBS/Spline) models. A spline is a mathematical expression that describes a curve. 

 

Most common nurb/solid formats are .stp,.iges,.ige, igs,.cat,.sat., 3dm,.rfa,.rvt,.dxf,.dwg,.sldprt,.sldasm,.slddrw,.catproduct,.catpart,.ipt,.asm,.cad,.jcd,.iam, etc. 

 

Rhino, Solidworks, Inventor, Autocad, Revit, TinkerCAD, Infraworks, ArchiCAD, CATIA, Fusion 360, 3D Builder, and others are some of the most common software that support this geometry type. 

 

We do not advocate or perform conversions of mesh formats into CAD software. Polygonal mesh formats may import as a single object and be difficult to edit.

To prepare a model for 3D printing, it should include the following features: 

  • Printer-friendly formats include stl, obj, x3d, and dae. 
  • Real-life physics (reasonable size, weight distribution) 
  • Wall thickness must be sufficient. 
  • No holes in the mesh must be waterproof. 
  • There is enough space between tight locations (clearance) 
  • separate and interconnected pieces are correctly arranged 

Refunds

  • Please contact our Support team (by filling up this form or sending an email to [email protected]) and provide the following details: 

     

    – Product name and order/invoice ID 

    – The issue/s experienced (including screenshots) 

    – The software used and its version 

    – Used file format 

     

    XO3D promises to process refund requests within three business days of receiving them. You are legally obligated to destroy any copies of purchased product files without the right to keep or use them in the future if you receive a refund. 

Read our returns/refund policy here.

Because our refund policy is intended to protect both the vendor and the consumer, it must be fair to all parties. We always issue a refund if the buyer made a mistake (and did not download the files) or if the model is defective (technical issues, missing or corrupted files, incorrect or confusing description), but we cannot issue refunds if the model is functional, matches the description, and the user has already downloaded the file.