Cinema 4D

I watched the lessons from the stream Particles in Cinema 4D | Stream Михайла Бичкова з його курсів Супер Cinema 4D Pro and others.
I made these scenes from the video. In the latest versions of Cinema 4D, Pyro particles appeared. Pyro particles in Cinema 4D are not rendered through the standard renderer, the Redshift renderer is used for this. The author of the stream rendered in Redshift, I worked in the Arnold renderer, it has support for rendering Pyro particles and I managed to render examples with similar settings according to the lesson.
I watched other lessons:
Introducing the Cinema 4D Pyro Pack
How to render Cinema 4D Pyro in Arnold Renderer! (Quickstart)
Lesson 3_13_1 Particle system in Cinema 4D
Lesson 3 13 2 methods of visualizing a system of particles in Cinema 4D
C4D Particles Tutorial (2022)

I rendered the scene in Arnold, there are differences compared to Redshift.
For some reason, in this example, at the beginning, the particles appear with an area that is not drawn smoothly, but with a visible outline of rectangular boundaries. Also, in the second animation, you can see how, when appearing, some of the particles fall through in the form of rectangular blocks. Particles can be reduced in size and increased in quantity. There are many settings in Pyro particles that require study and testing.

In this example, adding Field Force caused incomprehensible errors with normals disruptions.
In the version where the particles from the logo fly far into the author's sneakers, it is clear that the normals are directed incorrectly, in different directions, normals are directed in different directions, not along the line of movement, but the particle animation was performed correctly.
My normals were directed correctly, but when closing the file, the normals were not saved and it was not possible to leave them in such a way that the particles moved in their direction from the logo. After caching, the scene worked correctly, but when deleting the cache, the normals jumped and I had to add Field Force again and set all the settings, because they did not work at all. I made about 10 attempts and for some reason it worked and the file worked correctly.
Without this moment, I could not complete the lesson. When adding new forces, the Field Force normals also rearranged to be directed correctly and I had to do this operation several times when they were not reset and saved at this point. Also, when in Field Force the normals were directed correctly and the Friction modifier was added, the normals also crashed. Perhaps the crash occurred when saving the file when the animation was playing and the keyframe on the timeline was not zero. When saving the scene in the zero frame, there were no crashes, although I did not cache the file. The author used the Arnold renderer, I also used it. Some people in the comments who used Redshift had questions about the Vertex Color Tag settings. Since the renders have similarities and differences, some functionality may not work or be configured in other ways.
A scene with 15 thousand particles was easily rendered without caching without crashes. But when changing 1 million particles, caching was required, which lasted about 5 minutes. Two cached files appeared with a total weight of 60 Gb, although the original scene itself takes up 6.5 Mb. Even a cached scene with 1 million particles played with jerks and long pauses of 5 seconds per frame from the first time.
The video has some flaws:
1. when I rendered 1 million particles, when they turned into the shape of the sneaker, they created some distinct contours with indentations, clearly visible on the edge of the sneaker, but did not fill the surface evenly. To fix this, you need to test the settings more.
2. when the particles turn into the color of the shoe texture, they do not completely turn into the color of the standard material texture. For example, black particles were gray, and red particles also differ from the final appearance in the sneaker. Although there were no properties in the particle materials so that the particles would not be completely painted into the texture material. It turns out that the black shades of the sneaker are not displayed correctly throughout the animation. I rendered the scene in Arnold renderer, but the Vertex Map is linked to the default material of the sneaker that was in the source. When I export this material to Arnold material and link it to Vertex Color Tag, the particles are not recolored correctly, black shades turn to gray, reds also change saturation. Although without particles on the sneaker, the exported Arnold material with textures is displayed correctly. I used the default material for the particles and made color_correct, adjusting the color of the particles to the color of the sneaker materials.
Object appearance effect in Cinema 4D.
3. Also, the surface of the sneaker is filled with particles on one side. The place where the particles move does not change its position during the movement of the particles, because of this, the particles fill the entire surface of the object like spheres of magnets that move to the point of the magnet's force, but do not remain at the point of contact with the surface, but begin to fly past this place. To achieve a smooth, uniform filling of the object's surface, you need to further test the settings and possibly change the position of the force normals so that there are no new particles where the first ones were. It is unclear how the distribution of particles will occur, with a different number of particles, different forces are needed to restrain them. I used an additional effect of the object's manifestation, which will gradually draw the sneaker, but it is not as clear as with drawing with particles.

In this example, the particles in the Matrix object did not render in a simple render and Arnold. There is also a failure, the file is working and the particle animation is performed correctly. But if you close it and reopen it, the animation of the deformation of the two letters does not work, for this you need to turn off and turn on the object of the letter "O" in the Matrix object. Without this, the animation of the deformation of objects does not work, and you can look for a long time for the cause of the failure.

Here the tracer with the standard material does not render, you can render with the hair material or add a circle with the tracer to the sweep, then the tracer will render. There is a possible situation where if you do not render from the beginning, the tracer may not render, you need to either cache the scene or render all frames from the beginning, although in the render view the render works correctly.

The author rendered the scene in Redshift, I rendered in Arnold.

I was looking for a free 3D model of Tabasco sauce for example, but couldn't find one, so I used a soda can from the ready-made models. I rendered the scene in Corona.

To simulate fluid in Cinema 4D, there is a paid Realflow plugin or other particle simulators. In this lesson, the author of the video tells how to simulate water flow in Cinema 4D 2023 and higher without a plugin, using a Pyro object. I tried using Pyro in Cinema 4D 2023, but the settings were different, when adding the Pyro Object tag, the Pyro object was not added, so I did this lesson in Cinema 4D 2025.
In the author's video, the flow of water from the tap looks more like smoke, I experimented with the settings, set the Pyro Emmiter Velocity strength to 3000 and Denscity Time scale to 20%, this option is more like the flow of water from the tap, only the force of gravity for some reason did not act on the particles.
In the lesson I used 3d model of a water faucet

I used my image and generated a video from it on the site image-to-video-ai.com with the prompt "the tap handle turns and water flows from tap for 5 seconds", very realistic water was obtained, but the tap opens after the water starts pouring from the tap and the tap handle morphs into another form. Perhaps Ai wanted to close the water flow and reduced it a little. The change in the appearance of the tap handle is high-quality, but you need to achieve rotation or animate it yourself. These moments can be tested, there is only one free video generation, other generations are paid.
The first 5-second video with a simple query was generated in about 5 minutes.
The stream of water, which I spent quite a long time animating, was animated better by the neural network than I did, but turning the handle turns out to be a difficult and fuzzy task for the AI, although for a person, on the contrary, creating a stream of water is much more difficult than turning an object.
I tried to improve this result.
I made a second 10-second video with a more complex query:
"In the video, at first there is no water, then the tap handle turns 90 degrees clockwise and water starts to flow. Then the handle closes back and the water closes and a few drops at the end of the video a small stream of water drips and stops."
It took a long time to generate... 40 minutes, instead of the specified 3-5 minutes. In the second video, the tap does not turn on the water, it immediately flows. The tap handle turns incorrectly and tries to demorph at 90 degrees but in a different plane, resulting in incorrect morphing with water effects. Then the water turns off, and then at the end a trickle of water appears again. But with such a trickle, I can make video with a beautiful stop of water from the middle and end of the video and animate the turn of the tap handle yourself.