FAQ (frequently asked questions)


Viz4D is not only a 3D viewer, it also uses proprietary software and powerful cloud server to perform a series of very difficult and time-consuming tasks such as:

- Automatically Optimize and generate LOD for geometry and texture of every object in the scene (using our proprietary visually-aware optimization algorithm)

- High quality UV unwrapping for the whole scene with varies density based on our custom heuristics to get the most optimal lightmap layout

- 3D interactive programming and data compression are processed to support all platforms: Android, iOS, Windows, every web browser, every device...

- The final 3D content is hosted on our cloud server so you don't have to deal with its complexity. Also, all data is served using Global CDN, making it loads quickly from anywhere in the world.

All automated processes provide unprecedented performance at a fraction of the cost of legacy solutions.


+ GOAL: "To help designers create super lightweight 3D interactive space and publish it online regardless of skill level". Viz4D's goal is very difficult, will have to interfere with the original design data, so no one has ever gone in this direction. Any real-time solution available, including those from leading companies like Autodesk, Unreal or Chao, all choose the easiest way to require end users to have expensive hardware if they want to interact in real-time 3D. Only Viz4D, newly established, had to choose this way to hope to have a foothold in the market.

+ SOLUTION: To realize its goal, Viz4D has deployed a software service based on cloud platform (in SaaS form) to do everything for you: From processing, hosting to transferring data. This Viz4D solution can help you reduce costs from a few dozen times to hundreds of times compared to traditional manual methods: Eliminate real-time experts, IT staff and many software licenses.

+ TOOL: Viz4D has developed a series of specialized software for use in its SaaS service:

1- Automatically accurately optimizes every aspect of a 3D scene from polygons, materials to textures ... in the best way for Archviz: There is no similar solution on the market.

2- Automatic Vray material conversion: is equivalent to Unreal's Datasmith.

3- Automatic Corona material conversion: Similar to Datasmith, but no one has ever done it.

4- Automatically prepare UV lightmap for the whole scene optimally: Provides results different from all available UV software, optimized for Archviz

5- And many other stages are also programmed to handle automatically.

6- All Viz4D's softwares are done on rented cloud workstations on the infrastructure of: Aws, Azure or Google cloud ... with quite high rental rates: Can't test, tune, and reprocess multiple times until the results are as good (like you would on a Pc). Viz4D was forced to develop quality control algorithms for each of its software to ensure that all tasks were successful in one go.


Ownership is attached to the uploaded datas and security is assured by the fact that your uploaded original 3D scenes will automatically be removed from our server after processing. The right to exploit data after processing belongs to you: you have full rights to edit, delete, grant access ... for your interactive scenes.

(After we finish processing and you agree to publish, we will delete your original 3D scene).


The architectural design is completely modeled in 3D but only introduced to everyone with some images. It is a huge waste of potential. Viz4D has successfully developed a fully automated processing process, integrating seamlessly with the architect's current workflow to bring the entire 3D space to end-use mobile devices.


Upload only one scene per order. Currently we support all lighting and materials of VRay and Corona in 3dsMax


You do not know and cannot determine the ideal level of optimization manually (with eyes and sliders). The best way is for Viz4D to do that by uploading slightly redundant polygons models.


    Important Requirements:

  • No flipped faces: Flipped faces will receive incorrect lighting, usually shown as black in final result. Tutorial: Fixing Flipping Normals
  • No overlapping faces: Overlapped faces causes flickering surfaces (Z-Fighting). Tutorial: Fixing Overlapping Faces
  • The scale must be exactly like the real world

    Suggestion for optimal performance and load time:

  • Use as few Materials as possible. Similar materials should be reused.
  • Minimize the polygon count:
    For high poly meshes, consider remove or switch to alternative object with lower poly
    count if possible.
    Delete obscured, unused faces.
  • Delete outside of wall, ceiling, floor, etc. if you want to see through it in bird view mode.
  • Focus on designing the overall function, using just enough decorative items
  • Avoid complex materials: You should prioritize using simple material (VRayMtl, CoronaMtl, PhysicalMtl), avoid complex material types (like Blend, Layered...). Although we will try to convert all type of materials, but the results of these complex materials are more error prone (you can always fix the material in editor later if needed).


You will receive a notification after Viz4d confirms your order.

In about 8 hours you will receive an email with a link to the processed scene, you download and render the lightmaps according to the dimensions we recommend in there. Once done, upload the lightmaps, fine-tune the materials, add information ... and publish.


Hiring a powerful server to render in the cloud is very expensive and wastes all the rendering hardware, software, and skills you currently have.

You all have software and plugins to render in a powerful PC. When rendering the lightmaps yourself, you will also leverage your skills to find the most beautiful results or to create multiple light variations from a single original scene.


Viz4D's algorithm always tries to optimize as much as possible, but some objects such as plant, grass,fur, macrame ... will not reduce polygon much. You should avoid losing money in vain. Avoiding these also reduces load time and increases interaction performance for end users

- The number of lightmaps that Viz4D has to unwrap UV and you have to render depends on the total surface area of ​​the 3D scene, so you need to reduce the surface area to a minimum by: Delete obscured, unused faces.( remove outside of wall, ceiling, floor, etc...if not in use).

- To improve performance and reduce load time: Use as few Materials as possible. Similar materials should be reused.


Not only does Viz4D receive files in the .max format, but the main thing you need to understand is that Viz4D will support all the lighting and materials of the two popular rendering plugins in 3dsMax: VRay and Corona.


Viz4D already has a powerful optimization system that will optimize your scene automatically, so you don't have to do it manually.
But to ensure high performance even on mobile, you should try to remove unneccesary models in your scene before uploading.


Users of Sketchup, Revit and other 3D modeling applications can temporarily use Viz4D by exporting files to 3dsMax (and set lighting and materials with VRay or Corona in 3dsMax)

VRay for Sketchup will be supported directly by the end of next year.


Viz4D is run by VR3D.vn, a studio specializing in optimization and automation technologies in real-time visualization.

Having completed many projects since 2014 giving us the know-how to creating the most democratic solution for 3D interaction on the web.

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