The so-called VGL kernel is at the centre of Volume Graphics Software. It is able to render any number of volume data sets (such as MR or CT scans) and polygon data sets (such as CAD models) in one scene. Photo-realistic illumination is applied to all objects, both volume data and polygon data, using an illumination model as it is known from OpenGL. A range of clipping features allow the user to look into the visualized object.
The VGL kernel works with OpenGL and uses the resources of the graphics card for the rendering of polygonal data. Volume data is visualized using the so-called Real-time Ray-tracing (RTRT) technology that provides not only unsurpassed image quality but offers enormous advantages in rendering performance, especially for very large volume datasets. Further optimization of the performance is achieved by optimum use of multi-processor technology. The VGL kernel knows no limits in volume dataset size: It is the available working memory of the PC that sets the effective limit for the rendering of data. Volume datasets of 30 GB can easily be visualized interactively on a computer with 32 GB of RAM.