Modern day architects and designers are more interested for coming out with interesting features for the different constraints points. They want to create three dimensional renderings, which are concept diagrams, rather than simple line drawings. As a result, they can have wide range of variables to work upon, which will give variety of possible outcomes, rather than any simple design. This is being done by the use of parametric CAD, which is nothing but more advanced extensions added to computer aided design tools. By adding such tools, more constraints are added to the designs, so that the parameters for creating the renderings are quite different and varied. It is through the parametric technology that the best features will be evident in the renderings, because the idea is to have beautiful concepts played out to different changes, whenever and however required. Such facilities are parametric because the diagrams can be changed in real time and with better features for the shifting of different parameters.

*Parametric features can be altered with the best results and outcomes*

When there are fixed points around which the diagrams are being drawn, it is possible to give the results with simple computational methods and in simple line diagrams. These diagrams are nowadays being done through computer tools, while the more advanced formats are parametric because there are different parameters to be adjusted and brought into focus, for which the line diagrams will not be sufficient.

To make the renderings more conceptual, there is the addition of parametric technology to the designs, so that variety of points and parameters can be brought into single diagram. Around these points, the concept can be created, which is not a simple diagram, but a wide range of features that is multi-dimensional as well as variable. So, when the final results are obtained by **parametric CAD**, there will be lots of possibilities rather than getting the end result.