Thank you, Erwin,

I'm just careful with models and sharing.

If you like to work this way, ensure your models are named accordingly. Your Right Wheel and Right Brake are on the left, and the Left Wheel and Left Brake are on the right. Based on this, the wrong joints were used for the objects, and the constraint couldn't provide the expected results.

Swap the Constrain Tags from the Wheels and Brakes, (just drag them to the correct object. (Preferably while the steering wheel is straight)

(Ensure there are no Weight Tags/Skin Objects in the scene – if things look weird.)

Enjoy

Hi Erwin,

Thanks for the file and for using Google.

The Rig you shared had on the Geometry Constraints. I have no idea why they are there or where they come from. It feels like two tutorials mixed into one. Either way, they cause the problem. The wheels work fine if they are deleted and the Rig is set up newly. (I had to weigh the parts manually after the Bind process). There is a list option in the Bind Tab. There, the polygons in question should go it.

I do not re-share the file because it is a commercial model.

Happy Holidays

Thanks for the feedback, AlexC.,

You're very welcome.

Happy Holidays!

Thank you very much for understanding, Jakob.

I'm very open to Nodes (I learned about the compositing app "Shake" over 20 years ago and have understood the power of Nodes since then, e.g., in Fusion, Nuke, but also Redshift 3D, Xpresso, etc.).
I look forward to having them more present in the variety of options to create.

May I ask one question about learning Nodes, if you don't mind? Do you first explore the formats (Real, Integer, etc) that can go through the wires or the Nodes themselves and then explore how they connect?

Yes, the zero as ID is a good hint. Back when computer capacity was low, the first binary (zero) was nothing to throw away; it never changed -even today, it is in use.

Have a great Holiday Season.

Hi Gabe Gonzales,

The User Data option is for convenience. Otherwise, you must open the XPresso Editor before your animation setup session and search for the right node. Doing that in a project after a month is not fun, and things get complex occasionally. The idea is always to work towards a setup that is not in the way of animating the scene. When one is in the flow, things must be simple to handle and able to focus on what is important, and that is never to search for a parameter somewhere.

Those User Data Entryries can be done all on one Object (or several), allowing for the creation of a mixer panel. From there, creating a HUD (Head Up Display) Copy in the editor window is also easier. Which can show up when the Object is active or permanent. Like in a car where no one would put the head-light switch into the trunk

The Spline node is limited in this regard. If you like to have more, you can do it via Math. Example:
CV4_2025_drs_24_XPsp_01.c4d

Or just use a Helix and set the Height to zero, then increase the End Angle and perhaps the Interpolation. It looks like a circle, but it is so much more.

Cheers

Hi RH,

Thanks for your reply, not a problem with the access, but when I like to work on something, that blocks it.

The problem part is not the caps; it is the flat/straight part; here, you need to increase the segments/subdivisions so the influence is different.
The calculation is difficult if there is no subdivision, so the Phong shading is typically "Broken." You can Unbreak this edge. (It must be a Polygon Object by then.)
Main Menu> Mesh> Normals> Unbreak Phong Shading

Let's try a different route, for simplicity:
Create whatever you need and place it into a Remesh, then perhaps in Subdivision Surface.
CV4_2025_drs_24_TXps_11.c4d

Is that a way to go for you?

All the best

Hi AlexC.,

Thanks for the files.

Take a new Cylinder, make it small, then move it up and tilt it so it nearly touches the bigger tube, so the smaller one has more segments.
To avoid the part between the two tubes, as shown in the example shared, you must place a support object between them. (…_11.c4d)

The other option is to select the edges and connect the top and lower parts of the selections (file …_01.c4d). The tools needed for that are all in the Spline Menu. Setting the first point, connecting Splines. More of these Spline profiles must be created if the tube is bent.

Here are both files:
https://projectfiles.maxon.net/Cineversity_Forum_Support/2024_PROJECTS_DRS/20241218_CV4_2025_drs_24_MOrs_01-11c4d.zip

Cheers

Hi Jakob,

I double-checked this, e.g., asking Noseman directly as well. Right Mouse Click on the left-sided area, and then you get a long list with the Add Input containing four object entries.
As you can see, they are split into single and plural terms.

I will start supporting these Nodes when we have an official and long tutorial series here on Cineversity. As you can see, things change. Years ago, I bought a triple tutorial series pack, only to see after going through it that all I had learned was partially different in no time. That was when I stopped even considering investing more time into it.

However, when we get enough material here, we can say that stability has been reached. Until then, I invest my time into things with a better ROI. Thanks for understanding.

I have rotated the image, as we get 500-pixel tall images as a limit in the forum, but wide is not that limited.

But the best source is as before the Ask The Trainer Show, Last one for this year Dec 19th on Youtube
https://www.youtube.com/watch?v=VbkNfiLR1eA
Questions can be submitted at any time, and as far a time allows, will be discussed during the show.
https://www.maxon.net/en/thanks-for-joining-our-livestream?utm_source=livestream&utm_medium=livestream&utm_campaign=askthetrainer

Enjoy

Hi RH,

The simple answer is that Polygons are based on Points, and to create those edges, they are calculated between points. These Edges are straight, no exception. This means the polygons are made of straight lines that build a frame.
Each Polygon has a Normal, which indicates a direction, which is often not true, as Polygons with more than three edges can be non-planar.
However, everyone knows that angle in and angle out for reflections are primarily based on these normals but also on the point's normals. See image. (Normals are these little lines in the image.)

Among all these norms is a softness calculated that a round object would have. While there is an option to break that calculation, the transition from a flat to a "round" impression is also based on that calculation. If the flat part has only one long Polygon before the "round" part starts, the softening "bleeds" into the flat part. The solution here is more segments (polygons) for the flat part and handles for critical objects, perhaps individually. Typically, the Phong option "Style" setting can help here.

Manual work is sometimes needed for precision or a smooth transition from a flat to a "rounded" surface.

If you create such an object in metal, the machine will give you that "edge", but if one hand grains sand and polishes the object, the transition will move into the flat part.

Please start the Redshift Renderview and move the time slide, as I have animated the Phong parameter. Compare with Subsurface Division on or off.
CV4_2025_drs_24_TXps_01.c4d

For any other question in the future, please consider that a project file tells me more than images, and please avoid the "request access" option. Thank you.

Cheers

Hi staff-produce,

If it is not the web address of a specific site, then please check with tech-support.
(URL = A URL (Uniform Resource Locator) is a web address that provides a unique, specific location for a particular resource on the internet.)

I do not have a list with Adobe URL's, and as the mentioned in the thread you quoted, I can only repeat this:
https://www.maxon.net/en/support-center
As I do not keep track of what Adobe does in this area, and if they change I would provide wrong data here.

All the best

Hi let-fall,

Thanks for your time. The idea was just to describe what doesn't work and what makes it work—a few lines.
Just enough that the developers can reproduce the problem and solve it for anyone who needs to work in version 2024.

But, so far, I can't find any entry of a reported problem that would match your findings. Since it was with 2024.4.1, which was not the latest of 2024 releases, let's see if anyone has troubles with 2025, and it will soon be no problem for anyone.
You found a workaround, so let's close this thread. Thanks for your reply.

All the best

Thanks for the reply, Capprim,

Have you explored the Boolean in 2025.1.?
It should work better with UV and Textures.

While there is always something that might overlap, etc.

A good command over the UV workflow is a good thing to have.
Please let me know if you have any questions.

Cheers

Thanks for the reply, tie-version,

Please have a look here:
CV4_2025_drs_24_ANwr_11.c4d
The mask is smaller, so it can hide the ripple.
The Offset of the Spline Curve moves it then inwards.

Is that working for your shape?

All the best

Hi tie-version,

Please have a look here:
CV4_2025_drs_24_Anwr_01.c4d

I have used a dummy shape for the footprint.

The Linear Field can be used with a Spline curve, and this Spline curve can be based on a formula. Right-mouse-click (RMC) into the Spline field and "Spline Presets> Custom."
Use this formula, and after that, you might see a lot of huge values. Select all points on the Spline Curve and RMC - Point Types> EaseEase.
When it is elsewhere in the scene, this example points towards it. Any "shockwave" would have a starting point and expand from there. Perhaps if you have a different visual, then share a sketch.

All the best

Hi let-fall,

Thanks for pointing this out. Would you mind opening a ticket, as I can't find a way to have a problem with it?
https://www.maxon.net/en/support-center

Cheers

Hi Capprim,

Was the result to your liking, or do you need some changes? To prep a model with good UVs is typically a good idea.

What will happen in the future is nothing I can discuss here. This is a general direction. Telling something will not happen will allow for some deduction. So, I never comment on anything. Thanks for understanding.

If you are interested in new tools or functions, please use the Share Your Ideas:
https://www.maxon.net/en/support-center

Cheers

Hi Capprim,

Thanks for the file.

The typical way is to set the UVs in the way you like.
For example, with your file
CV4_2025_drs_24_TXuv_01.c4d

I had temporarily aligned the Workplane based on a few points, then used a Flat Projection, aligned it, and used the "Assign to UVW Coordinates" in the Object Manager> Tags … to get UVs written.

Wood is typically not a Cubic or Redshift's Triplanar option, but if you would like to use it, I would adjust the Axis to align with the Model to make that easier.

Here is a series that might help:
https://cineversity.maxon.net/en/series/hard_surface_model_uv_unwrapping?tutorial=hard_surface_model_uv_unwrapping_-_introduction_ui_scene_overview

All the best

Hi visual-summer,

Splines can be exported via Alembic. Please note: Bezier will be converted to Linear, for example. This means the interplate settings become important.

When you cache the new Particle System, it uses Alembic as a format. Have you tried this route?

If you have questions about Unity, that would be best in the Unity Forum, or as I did, I googled it, and it tells me that Unity can use Alembic Particle data to feed into their particle system. I have not done it, so please check with Unity Documentation or the usual forums, as I have not. When I answer, typically, I have done it with the current installations as things change, and answering from memory has not shown a winning strategy over the past decades. Hence, my suggestion is to ask artists who do this daily.

If we get more questions from more artists about Unity, I'm sure the tutorial content can be updated faster. There have been very few requests lately about Unity, even though we introduced the Cineware plug-in four years ago.
https://www.maxon.net/en/article/maxon-announces-cineware-by-maxon-plug-in-for-unity-technologies
The industry uses Unreal, especially since the strong rise of LED Studio productions.

You have an educational version; what is your department's support of this project?

All the best

Hi Gabe Gonzales,

Thanks for the file.

I have included two options on how to do it.

CV4_2025_drs_24_ANsp_01.c4d

One works with XPresso and User Data
https://help.maxon.net/c4d/2025/en-us/Default.htm#html/5826.html

The other one uses two Nulls that generate a two-point spline by connecting these.
Then the Align to Spline Tag moves one Null around the Circle.

Let me know if you have any questions about it.

Enjoy your weekend