Revizto works best with models up to 200 000 ft (approx. 60 km) in diameter. In larger models, some parts might flicker when you move the camera.

This article describes how to troubleshoot large-scale models. The following scenarios are available:

• Missing objects in large-scale models
• Missing landscape in large-scale models
• Flickering objects, section issues, and ruler issues in large-scale models
• Increasing model size limit

Missing objects in large-scale models

Problem

When I export a large-scale model to Revizto, some of its faraway parts are missing.

Solution

Do one of the following:

• If any of the model parts are far from the rest of the objects due to a mistake, correct this in the authoring tool.
• In the authoring tool, split the model into parts, so that they will be exported to Revizto as different Revizto models.
• Increase the model size limit.

Then re-export the model.

Missing landscape in large-scale models

Problem

When I export a model with a single landscape element larger than 200 000 ft (approx. 60 km) to Revizto, the landscape is missing.

Solution

If your landscape is larger than 200 000 ft (approx. 60 km), Revizto might remove it entirely.

Do one of the following:

• In the authoring tool, reduce the landscape size.
• Increase the model size limit.

Then re-export the model.

Flickering objects, section issues, and ruler issues in large-scale models

Problem

When I move the camera, some objects flicker (see an example in the video).

When I attempt to place a section plane, section box, or ruler, I cannot drag or even see it.

The in-app log might contain the following errors:

• <number> scenes are too far from each other.
• Models in scene <name> are too far from each other.

Solution

The objects flicker because they are too far from each other. 

To correct this, do one of the following:

• Correct the model in the authoring tool, and then re-export the model.
• If the objects belong to different scenes, adjust the scene positions to make them closer to each other (in a scene context menu, select Scene transform and then edit the origin coordinates).

Increasing model size limit

When you export a large-scale model to Revizto, Revizto might remove some of its faraway parts. For each model, it uses the following algorithm:

1. Find the point where the sum of distances to all Revizto model’s objects is minimal.

2. If the distance between an object and this point exceeds 100 000 ft (approx. 30 km), remove the object.

You can increase the default limit of 100 000 ft (approx. 30 km). Note that this might cause flickering of some model parts.

To increase the limit:

1. Open the folder with Revizto configuration files:

   • In Revizto 5.4 or earlier, it is C:\ProgramData\Vizerra.

   • In Revizto 5.5 or later, it is the Revizto working folder.

2. In this folder, look for the global.cfg file.

   If the file is available, it looks like this:

   {
       "rebuild_meshes" : 1,
       "farCoordsDoObjectsOffset" : 1,
       "UseMeshCenterForSceneBox" : false
   }

3. If the file is available, add the parameter that stores the limit (remember that all parameter lines except for the last one must end with commas):

   {
       "rebuild_meshes" : 1,
       "farCoordsDoObjectsOffset" : 1,
       "UseMeshCenterForSceneBox" : false,
       "maxSceneRad" : 1000000
   }

   If the file is missing, create it with a single parameter:

   {
       "maxSceneRad" : 1000000
   }

4. Adjust the maxSceneRad parameter. We recommend that you do not set it greater than 10 000 000 ft (approx. 3000 km).

5. Re-export the model to Revizto.