Crediting : Janne Karhu

Hi all, this is the blog maintainer.

for those who are new to this blog and are impressed by the work of Stephen and Farsthary, be aware that all these additions would not have been possible quickly without the impressive particle system from and continuously improved by Janne Karhu, and by him kindly advising them.  So if you want to support these developments, you can also give a part of your donation to him (he is also the code reviewer and the final integrator (this takes some time) so he REALLY deserves this).


Crediting : Janne Karhu

New Sticky colliders patch for particle systems

Hi all 🙂

The good news continue arriving 🙂 I added yesterday a stickiness factor to the particle collider objects that will allow more interesting effects as I will post soon in my site, like wet surfaces, etc.

Coding it as a property of the collider object instead of one of the particles will allow to set up scenes with different colliders that respond differently to the same particle system.

the patch is at:

Is very easy to commit as it will require few lines of code but the benefits are enormous, it works with all particle physics types and especially well with the upcomming Fluid particles. I will send it to Jahka for his expert review and commit

Hope you like 🙂 Farsthary

A normal fluid without stickiness

the same fluid this time with stickiness in the collider

The already commited new harmonic force with stickiness could made some cool fluid like behaviors too 🙂 !

A simple newtonian particle system with a sticky surface

New Sticky colliders patch for particle systems

Thanks for your support :)

Hi all 🙂

One more time the community is there when I need it: every bit of help count in this side of the world and after Christmas Blendiac
and WifeofBlendiac will bring me all your support at once, allowing me to ugrade the hardware and to continue building my home, also
freeing myself from annoying tasks that eat a lot of my free time, that I could use instead to speed up my Blender projects
(15 euros is my regular job salary so even $5 represent a third of my whole month salary), rest assured that every support I’ve received
from you will be invested on improving my Blender development. Also as I think support is everything ranging from encouraging comments,
resources and papers when I’m searching for them to funds and up above friendship 🙂

Thanks to all and Merry Christmas!

Thanks for your support :)

Possibilities are endless

Mixing fluids with instanced metaballs
Mixing fluids with instanced metaballs

Hi all 😉

The possibilities that fluid particles bring to the artist are truly endless, if you think outside the box not just realistic fluids
simulations are possible, including now multifluids interactions 😉 but crazy FX’s if you are willing to experiment and go beyond physics range
One nice side effect of being tightly integrated in the already powerful Blender particle system is that it could make use of every feature of it,
so many powerful features of advanced fluid simulation tools like Realflow are already available!!!!! Like for example sculpting/painting
fluids, with the comb/brush tools of baked particle sims you could actually shape your fluid simulations!!!! and that is just the top of the
iceberg 😉 Daniel Genrich has suggested me a feature that I have actually never think about it:

One thing I still miss is the ability to mix mixable fluid (e.g. 2 water based ones) with different colors and different densities and their properties get diffused/merged/mixed during time. So 2 water based fluids (which are mixable) where one is yellow and the other is red would result in a orange mixture.
Coding that should be a piece of cake for you 🙂 (Simply use the nearest neighbor function to get the color/property of the surrounding particles andd mix them according to the physics or some nice artist approximation) 😉

And yes, this is very easy/straightfoward to add to the current system, ANY particule property could be mixed/simulated/diffused because that is the heart of the SPH methods but I would like to research it a little more to extend it to fully mix complete materials/textures (shading); not just colors and simulation parameters. Of course, that’s something that should be reflected in the surface generation algorithm that will need to be developed for it, because the current metaball system surface generation don’t support mixing materials and also that part of the render pipeline will be subject to changes for good soon 🙂

I have recently increased the accuracy of the fluid particles taking into account now the particles masses in the whole simulation process allowing nice effects that
I show in some videos here like very dense fluids with ligthly fluids sims, etc. For post integration many improvements could be done and one of the Jahka targets is to increase the speed of the particles systems and lowering their memory consumption so more particles could be used in simulations because the current limit 100k particles for one particle system with fluid particles will be very low 😉

Here I show you more videos with crazy set up ones (asymetric fluids sims, microorganisms like, chemical reactions), and more practical others…. hope you enjoy them 🙂

A rough ligthouse sim, I love the waves 🙂

half dense fluid on top of other

double dense fluid on top of other

A fan mixing fluids

Crossing emitters

Asymetric sim

Microorganism like 🙂

A chemical like explosive reaction like sodium with water?

Hope you like them 🙂
Cheers Farsthary

Possibilities are endless

Killer feature – Multifluid interactions at last in Blender!!!

Hi guys 🙂

I don’t know if it’s the same for you, but since the incredible inclusion of the Elbeem fluid simulator in Blender I track every release trying to make this simple set up: mixing realistically a red fluid with a blue one, sadly without success.

My ignorance about CFD (Computational Fluid Dynamics) at that time prevented me to know that for Euler based methods (array based, domain based) this is not straightfoward to implement multiple fluid interactions of fully different natures (different density,viscosity,elasticity,plasticity,materials,etc), so one of my initial targets when I started (and later joined Stephen) in the SPH fluid particles was to overcome that limitation since one of the strongest point of SPH methods is the ability to handle in a transparent way any kind of interactions and that will make a nice family of use cases different from the Elbeem fluid simulator.

I never thought at that time that I would had played a role (even a small one 😉  bringing that feature to Blender…. WOW! it fills me a lot 🙂
I code it in one shot and when I ran the first tests I couldn’t stop jumping in my chair 🙂

So finally is here, as my Christmas present for the whole community, a very much expected feature, so soon you will be able to mix oil and water ,
milk with chocolate… anything you could imagine in your beloved Blender.

hope it blow your mind 😉
Happy Christmas, Farsthary

No Mix

Partial Mix

Full Mix

PS: the final thing in the todo list for committing fluid particles will be the surface generation, that will be tackled soon.

Killer feature – Multifluid interactions at last in Blender!!!

Using the enhanced Harmonic force

Hi folks!

this is a small tut about using the new harmonic force, hope you will find it usefull.

Lets create a simple yet cool particle scene with the new enhancement to the harmonic force
First create a plane emitter, with zero world gravity and around 500 particles emitted at the same
time in frame 0 with zero initial velocity, so they basically rest in that plane if no forces where

Now set the following particle properties:

Is important to set the Newtonian damping value because otherwise particles will blow away 😉 but you are also free to experiment with the Harmonic damping factor, the rest length, etc. the final result should be something like an oscilating water like drop, all of this without particle fluids yet!

Note also that you should use a newer SVN revision than  25500.

here is the example .blend

Cheers    Farsthary

Using the enhanced Harmonic force