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With the high-speed development. of computer systems having performance values of calculation machines, which needed one or more rooms of place and a special air conditioning a few years ago, the usage of methods dealing with a high amount of data at one side, and the need of doing a enormous number of calculation work at the other side became used more and more frequently. Tunnelling is one major field, where this advance is very important. That field of science is regarded as one of the more difficult engineering tasks. This is due to the fact that tunnels are excavated in a material whose mechanical and hydraulic properties are highly variable and whose behaviour is difficult to describe to a numerical simulation model. Numerical simulation of tunnel advance can serve as a powerful tool in the design and decision making on site. But this has to be done almost in real-time, that means that the calculation and the necessary post-processing must be finished, before the engineer on site is forced to make his decisions. This circumstance places a very specific challenge to the used hard- and software. This paper describes an algorithm, its development and improvements, which have been done, to find a method of data processing for the purpose of scientific visualisation with the necessary properties.