Metaverser

<h2 id="header-0">Introduction to User-Generated 3D Assets</h2>From M-Builder V4 and onwards users will be able to upload their generated 3D models into M-Builder not only for personal use but also in future for minting and sending them to store for selling and earning money. This document is a guideline on how to prepare your 3d models according to Metaverser standards . M-Builder V4 will be discussed in the coming weeks.<h2 id="header-1">Models uploader supports:</h2>Fortunately, the uploader supports a wide variety of model categories for your Metaverser world. You can create humanoid and fantasy characters with different animations, pets, decorative items, structures, nature elements, furniture, and more.<h2 id="header-2">What is Validator:</h2>The validator is a tool that checks whether your model meets the basic requirements or not. If your model passes the validator, you can upload it to your M-builder and use it on your land. However, if your model doesn’t meet the requirements, you will not be able to upload it unless you fulfill all the validator’s requirements. It’s important to note that all models that have passed the validator and been uploaded are strictly for personal use on personal lands.<h2 id="header-3">What is Model Review:</h2>After adding the uploader to M-Builder, the next step is to create a marketplace for all users who have uploaded, are uploading, and will upload their works through M-Builder. By sending your model to the store, you will have the opportunity to sell them as in-game NFTs and earn money. To mint and list your uploaded model in the store, you must submit the asset for review. In the review stage, unlike the validator where all validation is performed by a tool, our experts act as reviewers to assess your model’s quality in all aspects and determine its suitability for the store. If your model successfully passes the peer review, you can proceed to mint it and add it to the store for selling. However, if your model fails the review, it cannot be minted or listed in the store. Nevertheless, you can still use it in your personal builder as before.<h2 id="header-4">Model Format:</h2>Metaverser supports both the “glb” and “gltf” formats for uploading. This means that you can create your 3D model in any application and then export it in the glb/gltf format to use it in Metaverser. Some applications natively support the glb/gltf format, while others may require plugins for exporting, especially in lower versions.Note: We recommend using the “glb” file format for uploading your models to Metaverser.<h2 id="header-5">Materials and Shaders:</h2>As the “glb/gltf’ supports “PBR metallic/roughness” you should work with shaders in your application that have the most compatibility with “PBR Metallic/Roughness”. The supported properties for your materials to use in Metaverser are as below :<ul><li>Base Color: Base color gives you the color of your model.</li><li>Normal Map: Normal map is supported in Metaverser shader.</li><li>Emission: Emission maps allow you to selectively make certain parts of your model emissive, setting them apart from other areas.</li><li>Transparency: Transparency in models is determined by the alpha , which has two variations: “Alpha Clips” and “Alpha Blend. “Alpha Clips” allow you to make specific parts of your model either completely opaque (represented by white) or completely transparent (represented by black). On the other hand, “Alpha Blend” enables you to create a smooth transition between opaque and transparent areas, making it possible to achieve semi-transparent parts in your model.</li></ul><h2 id="header-6">Blender gltf/glb Guideline :</h2>If you are using blender you can do the following :<ul><li>Use “ Principled BSDF” shader for your material</li><li>For base color, use a “jpeg” texture for your “Base color” Channel.</li><li>If you have normal map, use a “jpeg” tangent space normal texture in “Normal” channel</li><li>If you have transparency, for creating an alpha clip effect, set the “Blend mode” in “Setting” of your shader to “Alpha clip” and for alpha blending set it’s mode to “ Alpha Blend” then add a grayscale “ jpeg” alpha texture in “Alpha” channel</li><li>If you have emission, add a “jpeg” emission texture to “Emission” channel</li><li>If you just have a uniform emission all over the model you can either correct the “Emission” channel’s color palette or load a “jpeg” color texture in “Emission” channel</li></ul><h2 id="header-7">Substance Painter gltf/glb Guideline :</h2>Substance painter gives you the ability to export your work as a glb/gltf format :<ul><li>When loading your model in substance painter choose “ PBR — Metallic Roughness “ workflow for better result</li><li>By default you access the “Base color ”,”Normal”, “Metallic”, “ Roughness”, “Height” channels which we don’t need height at all and “Base color” and “Normal” are the most supported between the others</li><li>If you want emission you can add “Emissive” to your channels from “ Texture Set Setting” window and clicking on plus button in “channels” then create your emissive texture and paint in emissive channel</li><li>If you want to have transparency in substance painter gltf export change your shader setting to “pbr metal rough with alpha blending” or “pbr metal rough with alpha test”then add an opacity channel to create your transparency in opacity channel</li><li>After you have done painting for exporting go to “ file/Export Textures” and choose “gltf PBR Metal Roughness” in output template and select your file format and export</li></ul><h2 id="header-8">3DSMax gltf/glb Guideline :</h2>If you are a 3ds Max user and using an older version that does not support glTF export and materials by default, you have the option to download and install the “Babylon file exporter” plugin. To achieve optimal results, it is recommended to follow the instructions below:<ul><li>Use “ Arnold Physical Material “ shader for your material.</li><li>For base color, if you don’t have transparency for your model use a “jpeg” bitmap for your base color channel</li><li>For both base color and transparency in your model use a “png” format and store your transparency as a pre multiplied alpha and base color in your RGB channel and apply it to base color</li><li>In some versions of plugin you can do the above action by loading a jpeg grayscale image in your “Transparency weight “ and a jpeg in your “Base color” separately without having to use png format to store transparency in alpha channel .</li><li>If your model have emission textures, load it in “ Emission Color”</li><li>If you have normal map texture, directly use your tangent space normal map in “Bump map”</li><li>Use Babylon file exporter to export your model as glb/gltf ( glb recommended more )</li></ul>Note: Keep in mind that you have the option to use other applications for exporting your models. While some software supports glTF/glb export by default, others may require the use of plugins. Regardless of the software you choose, it is important to ensure that you use materials supported by the “glTF PBR metallic roughness” standard in your 3D software. This will ensure compatibility and help achieve the desired appearance of your models when they are imported into Metaverser or other glTF-compatible platforms.<h2 id="header-9">Validator Requirements :</h2>There are certain limitations to consider when creating and uploading models to ensure optimal performance in the game. If your model exceeds these limitations during the upload process, the validator status will indicate them in red, and you will not be able to submit the model to Metaverser M-Builder until you address these issues. The limitations include:Max Mesh Vertices for Each Model : 10000Max Number of Materials for Each Model : 2Number of objects : 1 objectNote : This means before exporting if your model consists of several objects, attach all of them together to have just one object.Max Texture Resolution : 1024Texture Resolution: 32,64,128,256,512,1024Note: Textures should be quad (For example: 512x512)Max Total Upload Size: 5mbModel Unit : cmModel Boundary Size : Less than the minimum of land dimensionNote : These limitations are just for validating your model to your M-Builder for your personal purpose. For having your model in marketplace you should send model to review in your panel.<h2 id="header-10">Review requirements :</h2>In this section you can read about the aspects which will be checked in a model review.<h2 id="header-11">Vertex Count and model detail:</h2>Although we have a validator to check the vertex count limit when uploading a model, passing the validator does not guarantee that the model will pass the review process as well.In the image below, we have two similar table models. One has 144 vertices, and the other has 602 vertices. Both models pass the validation, but the one with 602 vertices will fail in the review because it contains unnecessary vertices.The model with 602 vertices appears more round and visually appealing compared to the one with 144 vertices. However, this level of roundness is not necessary for the object and adds a significant number of extra vertices, which can negatively impact the customer’s land usage. As a result, the model will fail the review process and will not be listed in the store.<img src="https://miro.medium.com/v2/resize:fit:1400/1*8XcPykO3f8fhPNHjklzbvA.jpeg" /><h2 id="header-12">Model Look:</h2>It is essential that your model has a visually appealing appearance. However, achieving a good-looking model does not necessarily involve adding excessive detail or excessive rounding. Rather, it means ensuring that you avoid issues such as overlapping polygons or vertices that can result in undesirable shading effects, normal inversions, or missing parts.By addressing these concerns and ensuring clean geometry, you can enhance the overall aesthetics of your model.<img src="https://miro.medium.com/v2/resize:fit:1400/1*udFDG2BHbwOWmOF-RYrEEA.jpeg" /><h2 id="header-13">Texture Optimization :</h2>Optimization is crucial in every aspect of a model. It is important to avoid using high-resolution textures (with a maximum limit of 1024x1024) unless absolutely necessary. Excessive use of unnecessary textures and their high resolution can lead to model failure during the review process.In the example below, there is minimal difference in appearance between using a 1024 and 256 texture. However, the 1024 texture is approximately 16 times larger in file size compared to the 256 texture. Using unnecessary file formats (such as PNG instead of JPEG) or high-resolution textures unnecessarily increases the file size and processing requirements.By being mindful of texture usage and optimizing their resolution and file formats, you can reduce the overall file size and processing burden, improving the performance of your model.<img src="https://miro.medium.com/v2/resize:fit:1400/1*KS-TN_R-7PeSH36-2vlwCA.jpeg" /><h2 id="header-14">Advertisement :</h2>While it is acceptable to include your brand or advertisement content within your personal models, it is important to note that submitting an object with advertisement content for the marketplace will result in a failure during the review process.The marketplace aims to provide a consistent and immersive experience for users, and including explicit advertisements can disrupt this experience. Therefore, it is advised to avoid incorporating promotional content directly into objects intended for the market.By adhering to this guideline, you can ensure that your models meet the requirements for the marketplace review and maintain a cohesive environment for users.<img src="https://miro.medium.com/v2/resize:fit:1400/1*OhfyixVlVr2_VqwhDGmReA.jpeg" /><h2 id="header-15">Rarity :</h2>Rarity indicates the level of uniqueness and value of your model. The higher the rarity level, the more special and valuable the model is considered. For instance, a model classified as “Legendary” holds more value than a model classified as “Common.” However, it’s important to note that submitting a model with a higher rarity level requires meeting certain requirements, which will be detailed later.It’s evident that when you submit a model with a higher rarity level, the review process becomes more stringent compared to lower levels. For instance, if a model successfully passes the review in all aspects but fails to demonstrate the uniqueness expected for its selected rarity level, it will not be accepted. Therefore, if you truly create something exceptional, it’s advisable to choose higher rarity levels.In the example below, both tables are well-modeled and identical, differing only in their rarity level. One model is submitted with a “Common” rarity level, while the other is submitted as “Epic.” However, it is important to understand that a simple wooden table cannot be considered as “Epic” and truly special. As a result, the review team will fail the model with an “Epic” rarity level, regardless of its modeling quality.Remember, the rarity level itself doesn’t inherently change anything unless your model is accepted by the review team and listed in the store. Therefore, selecting a higher rarity level (if applicable) does not automatically make your model different or more desirable.<img src="https://miro.medium.com/v2/resize:fit:1400/1*_Avt34RLRLrXhucr6PsEvw.jpeg" /><h2 id="header-16">Animations :</h2>You have the option to import animations for your characters or objects. However, it is crucial to ensure that the animations are compatible and properly applied to your model. A model with incorrectly set animations may pass the validator for personal use but will inevitably fail the review process for the store.During the review, the functionality and alignment of the animations with the model will be thoroughly assessed. If the animation does not work well or is not correctly set on the model, it will not meet the requirements for listing in the store.Therefore, it is of utmost importance to carefully test and verify that your animations are properly set and seamlessly integrated with your model before submitting it for review. This will significantly increase the chances of your model passing the review and being accepted for the store.<h2 id="header-17">Transform and Axis:</h2>To ensure a smooth user experience for those who purchase models from the store, it is highly recommended that objects have correct transforms and axis directions. The recommended values for the position are (0,0,0) in world coordinates, for rotation (0,0,0) in world orientation, and for scale (1,1,1). Additionally, it is important to adhere to the correct axis direction, which is “Y up.”By following these guidelines, you can avoid potential issues and ensure that your models are compatible with the platform’s standards.<h2 id="header-18">Unit Setup :</h2>In our M-Builder, we utilize centimeters as the standard unit of measurement. To prevent any unexpected unit-related problems, it is strongly advised to adopt the centimeter workflow for your work.By adhering to the centimeter workflow, you can ensure consistency and accuracy in your models within our builder environment. This will help avoid any potential discrepancies or scaling issues that may arise when working with different unit systems.By embracing the cm workflow, you can maintain a seamless and harmonized experience while creating your models within our platform.The guidelines for user-generated 3D assets in Metaverser provide a comprehensive overview of the process of uploading, validating, reviewing, and optimizing models for use in the metaverse. Users can create a wide range of 3D assets, including characters, structures, furniture, and more, and upload them through the M-Builder tool. The validator ensures that models meet basic requirements before uploading, while the review process evaluates their quality and suitability for the marketplace. Considerations such as vertex count, model detail, texture optimization, advertisement content, rarity, animations, transforms, axis directions, and unit setup are all important factors to address. By following these guidelines, users can enhance their models’ appearance, performance, and compatibility within the metaverse ecosystem.

Guidelines for User-Generated 3D Assets in Metaverser

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