Once having added layers, either as images or elevation layers it should be noted that data takes some time to become visible at their maximum resolution. This happens because the 3D extension creates a multi-resolution representation of the layer in the local hard drive which is used for quick visualisation of the data at different scales. This visualisation cache is actually stored in the local folder gvSIG\.data\cache\Earth within the user’s root directory.
The first time data is visualised or when the scale or the view is changed, the cache generation process is executed automatically. The speed of the cache creation will depend on the speed to access the source (it will be much slower for remote services) and the complexity of the data (e.g., vector quantity). Once the cache is created, panning within the same area will render fast and interactive visualisation. However, if the properties of the layer are changed and they affect the existing cache, this will be recreated automatically.
There is a way to force a cache to be invalid (See the “Refresh Layer” section).
