To try to animate how beer pours is an almost impossible task. 

This company are leaders in creating fluid motion.  Read below and click on the link to see a short animation of beer pouring into a stein.

The animation and rendering of fluids is a challenging problem in computer graphics. To achieve photorealism in the animation of fluids, a branch of maths called computational fluid dynamics is increasingly being used.
CSIRO mathematicians are world leaders in this research.

Bubbles growing and shrinking and floating to the top of a glass of beer, water washing around buildings in a flooded street, two liquids mixing together, and smoke wafting through the air – all these can be described by mathematical equations. These equations are called smooth particle hydrodynamics algorithms (SPH).

CSIRO mathematicians are world leaders in this research.Effects like these are of interest to:
motion picture studios
special effects (SFX) labs
film production houses. 

Fluids effects in movie blockbusters such as Poseidon, Titanic and Perfect Storm were developed with hugely expensive single use solutions. Their developers want more accessible, super-realistic, fluid simulation tools.

CSIRO has partnered with its South Korean counterpart, ETRI (Electronics and Telecommunications Research Institute), to create, using traditional SPH algorithms, more realistic, faster, fluid flow and simulation effects for digital content generation.

The project is developing a software plug-in for Maya, the package of choice for high-end three-dimensional (3D) Computer Graphics and 3D Modelling software within the film and animation industries.

View the clip demonstrating the software's capability: www.csiro.au/files/files/pf1o.asx

waves lapping on the shore
beer pouring into a stein 
water flooding a street.