A quick test of the "analog" filter in the Access Virus TI (it is also available in the Virus C). It is based on the MiniMoog ladder filter. There is also "analog" saturation, which afaik can not be turned off. However, you can add more saturation by turning the Osc Vol parameter to the right.
Overall, I think it is a pretty good sounding filter. Nothing super special, but fun nonetheless. The only downside is this filter mode uses up a lot DSP power, thus the polyphony will be cut down by nearly 50%.