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New granular, viscous, and viscoelastic materials.
New rigid and elastic deformer.
New "Particle Skinner" tool transfers position and velocity data from particles to objets to move and deform them.
Multi-physics solver (I). All materials are managed under the same solver framework.
Multi-physics solver (II). Different fluid and deformer types are able to interact, e.g. granular + liquids, viscoelastic + granular, elastic + liquid.
Speed and memory improvements (GPU 3-8x faster than CPU).
Improved robustness of GPU calculations.
Huge speed improvement in calculating the volume of interacting objects.
Interactions between multiple fluids.
Multiple scene objects within the same project.
New "Tensile Strength" parameter helps to shape and improve a fluid's borders in conjunction with "Surface Tension".
New "Vorticity Boost" parameter for vivid and turbulent fluids.
Use image maps for an object's friction, stickiness, roughness, etc. to influence particles.
2.5 Updated Dyverso library with better GPU support.
2.5 Improved stability with Thinking Particles, less RAM-consuming.
2.5 "Image" emitter supports animated textures and Cinema 4D noise shaders.
2.5 Adjustable image resolution for "Image" emitter in Cinema 4D's preferences.

Better and more robust collaboration with external render engines.
Improved motion blur: motion blur is now possible in conjunction with particles and render instances.
2.5 More and improved vertex maps for meshes.
2.5 Weight maps for meshes.
2.5 Improved "Scale" parameters for mesh vertex maps.
2.5 Global and node-specifc frame offset parameters for synchronizing simulations with other Cinema 4D scene elements.

Meshes can now be built from already cached simulations with the "Cache Meshes" button.
New "RealFlow" preferences entry to specify a default cache folder.
Improved connection to Cinema 4D's MoGraph, Hair, and Take.
New "Volume" und "Collider" tags.
Fluid masking allows to shape particle volumes through helper objects.
Improved and faster method for filling object volumes with particles.
Automatic or manual time step management.
New "Links" field for type-aware linking of fluids, deformer, emitters, daemons, and collision objects.
Random parameters for scatter effects like sand piles, river gravel, ground rocks, etc.
2.5 Multiple "Collider" tags per object.
2.5 Real-time viewport preview for vertex and weight maps.
2.5 Highlight new parameters, options, and features in Cinema 4D's GUI.
2.5 Improved Thinking Particles workflow.
2.5 New modes for "Fill" emitter: filling and particle layer on object's surface.
2.5 New, powerful visualizer tool for previewing, adjustung, and evaluating force-based daemons.

New plugin architecture
Cache file format is Alembic Ogawa for meshes and particles.
For rigid and elastic deformer we use a proprietary format, but only temporarily. We will be moving to Alembic for these types as soon as possible.
2.5 Improved stability and bug fixes.

...

Sub-frame interpolation, to sample properly creation of particles and daemon forces between frames.
Mesher can be clipped using Cinema R20 fields.
Mesher Auto Build mode x2 faster.
New curvature-cohesion model added to surface tension daemon.
New daemon that allows for the creation of the fluid effect typically seen at Hi-speed macro photography.
Force scale for daemons.

Quads can be used, instead of triangles, for meshing.
Translation/Rotation/Scale transformations for fluids.
Thinking Particles and geometry instances can be scaled using particles speed, age and vorticity.

Stitcher for Alembic files.
New menu buttons for quick access to "Cache Simulation", "Cache Meshes" and toggle "Use cache" on/off.
Possibility to enable/disable disk write per node in the Cache parameters tab.
New "Cache filename" parameter for domain and mesh nodes, to specify the filename prefix that will be used as output.
When a caching process is about to be launched, check node names in the scene to warn the user about possible name conflicts.

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