The Combination mode dialog
Combination mode makes the creation of more complex planets terrains easier by combining a built-in planet or ArtMatic surface with up to 6 additional ArtMatic terrains. The additional terrains can supply a wide variety of features: from beach pebbles, boulder rocks, rivers, volcanos, to architectural structures, custom oceans and more. A layer can also be used as a filter to modulate elevation and add texture details.
Main Planet popup
Be sure to take a look at the example files to see the many different features that combination mode can give to Voyager worlds.
Examples can be found in Voyager examples/Terrains & Landscapes/VY5 Combination/ and in Voyager Scenes/Combination scenes/
Once the dialog is opened by edit in main UI you have all the controls to import, edit and manage terrains layers.
Click on a layer tab to access each layer's settings. Active layers are indicated with a red dot. To create a new layer select an unused slot and open an Artmatic file that will define the particular layer features. The Browse Library button give you a direct access to a number of useful presets to enhance your scene. Position the layer using the Map or numeric entries, choose the combination mode and eventually change the layer scale. Results should be seen interactively in 3D in the main preview area as well as in a 2D top view in the Map.
Choose the surface that will be the main surface. The additional layers are combined with the main planet. The main planet can be either a built-in planet or an ArtMatic surface/ animation.
Main planet edit/open/reload
When the main planet is an ArtMatic surface/animation, these buttons let you edit the surface in ArtMatic Designer (if it has been installed), open a new ArtMatic file to use, or reload the ArtMatic file. Use the reload button, if you edit the ArtMatic file while the Voyager scene is open.
HF Filter % slider (High Frequency Filter).
This slider reduces the amount of detail in the built-in planet. In many cases, this makes the ArtMatic contribution more noticeable where fine surface detail is concerned. This filter only affects the base planet and not the ArtMatic contribution (as opposed to the High Frequency limit set in the Preferences dialog which affects everything).
Use this checkbox to toggle the layer's active status.
Browse library pop up gives you a direct access to ArtMatic systems designed for combination mode and stored in the Voyager Library/Combination/ folder.
It contains Surface details, Surface textures, Alternate seas, and Filter folders.
These buttons let you open a new ArtMatic file to use, edit the layer system in ArtMatic Designer (if it has been installed), or reload the ArtMatic file.
Surface Overview Map.
This map provides a top view of the surface with camera orientation lines that display the camera's orientation and field of view (as in the main window's surface overview). Click on the surface overview to center the current layer's ArtMatic system at the clicked location – the click sets the Longitude and Latitude offsets to the clicked location. This feature is useful if you want to position an ArtMatic structure at the current location rather than at the center of the Voyager world.
Center to world origin
Reset the offsets so that the Voyager world and the ArtMatic world are both centered at 0,0.
Center to Current View
Set the longitude and latitude offsets to the center of the current view.
This slider's meaning depends on the active combination mode algorithm (see below) and usually controls the amount of influence that the ArtMatic layer has on the main planet.
Combination Mode popup algorithms :
Blend the main planet with the ArtMatic surface by performing a weighted averaging of the surface elevations. The slider controls the weighting of the blend. When the slider is 0, the Layer has no influence. When the slider is set to maximum, the Main Planet has no influence. Blend is the prefered mode to apply filters.
- Maximum Add:
Compare the main planet with the ArtMatic surface and add the ArtMatic surface where it is higher than the main planet's surface. The slider bends the ArtMatic surface to follow the main planet's surface before the comparison is made. The additional "Feather" slider controls the smooth blending of the edges.
Adds elevation of layer to the main planet. The slider adjusts the relative weighting of the main planet's surface and the ArtMatic surface. Unlike Add Alpha and Maximum Add, Add combines both surfaces even where the ArtMatic surface has values less than 0. Where the ArtMatic surface is less than 0, it will carve out indentations from the main planet's surface.
- Add Alpha:
The elevation of the ArtMatic system (when > 0) controls the blending of the main planet with ArtMatic surface. The slider controls the degree to which the ArtMatic surface is deformed to follow the main planet surface before the blending is done. When the slider is set to the maximum value, the ArtMatic surface will follow the contour of the planet surface. When the slider is set to 0, the ArtMatic surface is left un- changed. Set the slider to the maximum to add details such as rocks to the main planet's surface. Where ArtMatic output values are greater than 1 the surface is taken entirely from the ArtMatic surface. Values below result in a weighted blending of the ArtMatic surface and the main planet.
- Alternate sea:
Replace the built-in sea with an ArtMatic sea. The ArtMatic sea should be an RGB+Alpha tree. The tree's RGB output defines the color texture, and the alpha channel defines the sea height (making waves possible). See the example file Bad Sea. The Bad Sea example (shown at left) makes use of an extra output mapped to Ambient to give the sea foam an added luminescence. Voyager's native sea will be visible where the replacement sea has very negative values. The slider has no effect in this mode.
Minimum is taking the lower elevation of the Main planet and the layer's terrain.
the slider performs a weighted averaging of the unaltered Main Planet with the calculated minimum.
The additional "Feather" slider allow a smooth blending of the edges when feather is above zero.
- Random Blend:
Randomly blend the main planet and the ArtMatic layer with the slider controlling the frequency of a low frequency blending noise. This mode is handy to randomly replace planet zones with features of the layer's terrain
- Blend on lows:
Blend in the layer where the main planet's elevation is low. The slider controls the maximum elevation at which blending occurs.
- Exp neg Alpha:
This mode blends the ArtMatic layer with the planet in such a way that the ArtMatic surface cuts through the main planet. Geographic Clut view RGB View Where the ArtMatic elevation (alpha) is greater than 0, the surface is provided completely by the ArtMatic sur- face. The Feather slider influences how alpha values less than 0 influence the mix of the ArtMatic system and the main surface. When feather is at its maximum, negative values have very limited influence on the main planet. The ArtMatic surface's influence drops off exponentially as the value decreases below zero. When feather is at the minimum value, the influence of negative values drops off very slowly so that the ArtMatic surface has quite a bit of influence even where the alpha value is very negative. Generally, the feather slider will be set close to the maximum value.
These fields provide offsets to control the relative position and elevation of the ArtMatic terrain layer and the main planet. The offsets are added to the ArtMatic file's normal home position. You may also use the Map view to set layer origin.
Global Scale %
This is a scaling factor that is applied to the ArtMatic file before it is combined with the main planet. It represents the relative scaling of the Voyager world to the ArtMatic world. Hence, values over 100% reduce the size of the ArtMatic features while values less than 100% increase the size.
Terrain shader Settings...
You can call this dialog to adjust terrain rendering & shading options.