Headley Brothers RIPs (Raster Image Processor) rasterise vector elements at 2540 dpi. Vector content rasterised by the flattening process is set to 2400 dpi in the recommended flattener settings.
When overlapping transparent objects are flattened each shape that results is called an atomic region. The shape of an atomic region will follow the lines, curves and shapes of the objects. Areas where multiple transparency effects overlap are called complexity regions. Rather than being flattened as many small atomic regions the objects within a complexity region are combined into a single rasterised shape during flattening. When the flattener settings are set to the highest fidelity (as the recommended preset) no complexity regions are produced. This produces the best output but may slow the process.
Identifying if transparency effects are present
Pages that contain objects with transparency will display the the Pages palette with a chequerboard pattern. Use the Flattener Preview palette (Window>Output Preview>Flattener) to identify which objects have transparency effects and which objects are affected by them. The Flattener Preview palette highlights transparent objects/images, as well as areas affected by transparency.
When "All Affected Objects" is selected in the Flattener Preview palette areas that are affected by flattening are displayed in pink, while areas that are not affected by flattening are displayed in grey.
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