Hello,

I noticed that adjusting the 'Visibility' of the Display Tag applied to a Volume Builder object has no effect. I just wanted to check if this is a normal behavior or a bug.
I would like to achieve a volume of fog that dissipates gradually to 0% visibility and expected to use the Display Tag for achieving that.
Could you suggest any other way to do this?

Hello,

I am no longer seeing the video tutorial series on Cineversity for Introduction to Python in C4D .

I have watched the series a few weeks ago, so I know it exists and even Google has it in their search results.

Could you please restore this series of videos and make them available again?

Thank you

Ah I see! I think the trick is to put the rigid body tag on the parenting sphere, not the group, as you have done in your example file. And that's good to know that the Hierarchy Merge Level only works with Mograph. Thank you, Dr. Sassi.
That's a nice tip about the simulation's draw option. I haven't used it before, but I can see it coming handy.

This file is the one without the cloner:
RigidBodySimNoCloner.c4d

Hello,

I'd like to simulate a group of circling spheres getting attracted to a position in space.
From my experiments, it seems that the 'new' rigid body dynamics only works for Cloned objects. Without the Cloner, the attractor doesn't have any effect on the group that has rigid body tag. I'd like to know if someone can confirm this.

I've also tried the bullet rigid body tag, and that seems to work without the group being cloned (However I have other limitations with this system, so I'd like to use the 'new' dynamics system).

If someone could shed some light on this, I'd most appreciate it!
I've attached the file that demonstrates my problem.RigidBodySimc4d.c4d

Thanks Dr. Sassi!
I didn't think that the Python Node in Xpresso is limited in that way, but good to know. I'll think of a work around using other Xpresso nodes.
I wanted to use the Python node because I wanted to make the spline object change only once in the scene session when certain conditions are met.

For example, in your file, let's say that the 'Extrude Instance's Reference Object is set to Text Spline.0 'manually' at frame 0. How can I set it to Text Spline 2 if and only if when the distance from the range mapper gives 2, but leave it as Text Spline.0 otherwise? AND to make this change only once and not keep changing back and forth between Text Spline 0 and Text Spline 2 as the distance oscillates? I thought of using a global variable in python to keep track of the change (like a boolean isChanged) and execute the change only once. But may be I am totally off in my way to achieve the target.

Let me know if you have any helpful hints.

Here's my C4D file:
https://www.dropbox.com/scl/fi/mmyjml144miaysi9dsxni/XPressoTest.c4d?rlkey=67qbiypwtc68hgfebb8n3li7a&st=syo542kn&dl=0

On the Xpresso tag of the Antihydrogen node, you will find the Python node that I'm referring to.

Hello,
an Xpresso python newbie here.

How can I set a new spline object to the 'Align to Spline' tag inside the python node in Xpresso?

I am using Xpresso to calculate the distance between two objects and inside the Python node, I check if the distance is less than a certain length, I set a different spline object to the 'Align to Spline' tag of an object. To achieve this, I've tried dragging the new spline object into the python script. I've also tried setting it as a user data of the python node and used it inside the python script, but neither way worked.

Overall, I don't know how to access the objects in the Object Manager from the Python node. If someone can shed a light on this, I'd most appreciate it!
Thank you in advance!

I have just created a support ticket as well. Ticket ID##605775

Thank you @Dr-Sassi!
That's good to know that the feather UV is actually broken in 2023.
I thought I didn't set it up properly. Thank you for your feedback and filing the report.

Hello!

I'm trying to get the feather textured with horizontal stripes.
I've followed this video on Cineversity:
https://www.cineversity.com/vidplaytut/creating_a_feather/
and added a Gradient Texture to the feather/hair material. However, I can't get the striped look when rendered on Redshift.

Not sure what I'm doing wrong.
Could you be kind and take a look at my file here?
https://www.dropbox.com/s/4o6vflqx9vka1hc/featherColorTest_09_05_2023.c4d?dl=0

Dear @Dr-Sassi,
These are some great tips!!! I didn't know about Redshift Proxy! My initial test shows that C4D is so much faster using this trick. Thank you for your suggestions. I like your idea of offsetting the animations and varying some geometry/forces and creating several different proxies.

Just a question: For the step using a "Matrix Shatter", do you mean Matrix Scatter? I am not familiar with either of them, but my quick search shows that there exists Matrix Scatter but not Shatter (cool name though).

Thank you @Dr-Sassi ! I've just uploaded my file to the provided link in Dropbox.
The file is my project to model a feather-worm (a marine animal), like the ones you see here:
https://cdn11.bigcommerce.com/s-yzgoj/images/stencil/500x659/products/1726482/4190747/apixogp2q__72548.1627143743.jpg?c=2
https://cdn11.bigcommerce.com/s-yzgoj/images/stencil/1280x1280/products/1725709/4448318/apirnzdr0__21768.1627144073.jpg?c=2

My main concern is to know if the way I've set up the 200 feather objects is acceptable (I don't know what is a typical usage and scale of feather/hair objects in a scene; is it in 100s, 1000s, 10000s etc.?). Does it make sense to have the dynamics enabled for all of them? I was not able to cache the "haired" feathers; C4D was taking forever so I had to kill the process.
Also is the way I've set up the "cloned" feathers along the matrix object aligned along the helix correct? I'm not sure if there's a better way to do this.
Also I would like to gradually scale down the size of the feathers in the center (matrix positions 0 through 20, for example), but it seems that scaling down a hair object messes up the geometry. I am stuck in that respect, so I would really really appreciate any feedback you could provide. Thank you!

Hi @Dr-Sassi!
Thank you for your suggestion of using the field for the Wind Object. I have set up a Random Field set to Noise, and that seems good enough; some noise types worked better than others (Sema works well in my scene). However, since I have 200 feather objects (converted to hair) in my scene, it's very slow to simulate. I'm caching all the hair objects at the moment and crossing my fingers that the C4D will not crash.
I would very appreciate if you could take a look at my set up to see if I'm doing this properly. Is there a way to share my file, like you did in your previous post? It's 35MB, so I cannot drop it in this post....

Hi @Dr-Sassi!
Thank you for your suggestions. I have tested both approaches and they both were able to clone the Feather object as I had desired, but as you pointed out, the resulting clones do not have individual reactions to Forces. That's too bad as that's what I had been aiming for...
I didn't understand what the Feather's Adaptive mode (for the Spacing, if I understood correctly) has to do with all this though.
Anyway, thanks for your help. I guess I will try to create individual feathers and convert them to hair object manually, and see if they have separate reactions to Forces.

I tried to drop my file here, but it looks like this interface doesn't accept the c4d file. How should I upload my c4d file?

Actually, I have another question related to this "haired feather" object, @Dr-Sassi !
I tried to clone the "haired feather" object, since I'd like a several copies of them in my scene, and they seem to be not clonable.
Is it not possible to clone a hair object?

Thanks a lot for your help, Dr. Sassi!
That works perfectly. So basically I understand that I should convert the feather object into a hair object in order to get the dynamics working, correct?
I see that certain settings in the hair object are not editable, like the Roots Count and the Hairs Count. I suppose those are fixed during the transformation from feather to hair.

Hello,
Can a feather object be animated using forces like turbulence or wind? I would like to animate what are called the 'barbs' (the fluffy part) to be animated by turbulence. According to my test, these barbs don't seem to be affected by any of the forces, so I was wondering if any of you could shed some light on this. Thanks in advance for your help!