The viewer can display more than one scene file at a time, each in its own viewport. This is useful for comparing two versions of the same site model, viewing different sequences or bookmarks from the same file simultaneously, or placing completely different scenes side by side.
The viewer supports two file types:
- .ctws — a single scene file
- .ctmws — a multi-workspace bundle containing multiple scenes with a predefined layout
The Scene Management button (earth icon) on the right side of the toolbar opens the Scene Management menu, which provides all the controls for adding, replacing, closing, and swapping scenes, configuring how multiple viewports behave, and exporting bundles.
Scene Actions
| Action | Description |
|---|---|
| Add Scene | Open a file picker and add a new scene. The current viewport splits automatically — wider panes split to the right, taller panes split downward. The split button dropdown also provides Add to Right and Add to Bottom for explicit control over split direction. |
| Close Scene | Close the active viewport. The adjacent viewport expands to fill the space. Only available when multiple scenes are open. |
| Swap Viewports | Swap the active viewport’s content with another viewport. With exactly two viewports, the swap happens immediately. With three or more, the non-active viewports are highlighted — click one to complete the swap. Press Escape or click the active viewport to cancel. Only available when multiple scenes are open. |
You can select multiple CTWS or CTMWS files at once from the file picker.
Tip
You can also drag and drop .ctws files onto the viewer to add them as new viewports.
Working with Multiple Viewports
When more than one scene is open, the viewer splits into resizable panes. Each pane shows its own independent scene with its own model tree, bookmarks, and sequences.
- Click on a pane to make it the active viewport — the active pane is highlighted with a colored border
- Drag the divider between panes to resize them
- The side panel (Interactive Tools, Scene Properties, Model Tree) always shows the controls for the active viewport
Viewport Titles
Each viewport has a Title that defaults to the scene filename. You can edit the title in the Scene Properties > General section when multiple viewports are open. Titles are preserved when exporting as .ctmws.
Saving and Sharing Multi-Viewport Scenes
Once you have arranged multiple scenes the way you want them, you can save everything as a single .ctmws file to share with clients or colleagues. Click Export as .ctmws in the Scene Management menu to create the bundle.
The exported file preserves the complete workspace state, including:
- All loaded scenes and their content
- The layout arrangement and split ratios
- Viewport titles
- Linking settings (view synchronization, sequence linking, bookmark linking)
- Overlay title visibility
Recipients can then open the single .ctmws file to see the exact same multi-viewport layout without needing to configure anything themselves. Models are optimized to reduce file size when content can be reused across scenes.
Multi-Viewport Options
These options appear in the Scene Management menu when multiple viewports are open. They are organized into sections: Linking, Options, and Export.
Linking
| Option | Description |
|---|---|
| Views | Controls whether viewport cameras stay synchronized. Choose Auto (default — automatically link viewports whose scenes cover similar geographic areas, adjusting for differences in coordinate origin or Z scale), Yes (always link all viewports), or No (each viewport is independent). Auto re-evaluates whenever scenes are added or removed. |
| Identical Sequences | When enabled (default), changing a sequence state in one viewport automatically updates matching sequences in other viewports. Sequences match when they have the same name and identical state names. |
| Bookmarks | When enabled (default), applying a bookmark in one viewport automatically applies bookmarks with the same name in other viewports. |
Tip
When viewing the same file in two viewports, turn off Identical Sequences to compare two different sequence states side by side, such as viewing two different plume levels of a contamination plume. Keep it enabled when comparing two different models so their sequences stay synchronized.
Options
| Option | Description |
|---|---|
| Overlay Title | Show a title label in the corner of each viewport pane to identify which scene is loaded. |
Export
| Action | Description |
|---|---|
| Export as .ctmws | Save the current multi-viewport layout as a .ctmws bundle file. The bundle includes all scenes, the layout arrangement, split ratios, viewport titles, and linking settings. Models are optimized to reduce file size when content can be reused. |
Reset
| Action | Description |
|---|---|
| Start New Scene | Open a file picker and replace all existing scenes with the selected file. This closes all current viewports and starts fresh. |