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.


Viz4D has two processing mode:

"Dynamic lighting" (default): FBX file or Max scene (VRay / Corona materials are supported).
"Baked lighting" (advanced): only 3ds Max scene with V-Ray or Corona lighting is supported at the moment (V-Ray for Sketchup and Revit coming soon).


    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


You will receive a notification after Viz4d confirms your order.

- For "Dynamic light": you will receive a second email in an hour containing a link to the completed scene. You can fine-tune lighting, materials, adding info... and publish.

- For "Baked Lighting": you will receive a second email in several hours containing 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.


(Only for "Baked Lighting" option)

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 ... cannot be reduced much polygon. 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.


In the "Baked lighting" option, Viz4D is not just receives 3D model in the .max format, but Viz4D also supports all the lighting and materials comes with it from 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 "Baked lighting" option 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 this 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.