The most important feature included in this new version is a modular Particle System. The idea behind this new design is that each part of the system is setup using one or more modules, each describing behaviors for particle generation, update and rendering. Modules handle specific properties (like position, velocity or color) and there are many options already available. I suggest you take a look at the Particle Showcase demo to have a glimpse at the new Particle System in action.
This version also features a working interactive console for simulations. Such tool is extremely useful to change simulation parameters at run-time.
Of course, it is possible to extend the default functionality by implementing custom commands for your own simulations too!
The Profiler has received a huge improvement too! It now displays additional run-time information and a real-time frame-rate histogram:
Other improvements and changes can be seen in the Release Notes for version 4.5
Feel free to contact me if you have any questions or comments.
See you around!