[Sam Treadway]

I’ve starting using the takes system a lot for things like this rather than passes and post-processes.
Just create a new take and then with the main take selected, drag all the material tags for the hair, and with a new take active replace the referenced materials in each tag with a new material that is solid white in luminance and all other channels turned off. This gives you a sort of inverted matte. Make sense?

[Sam Treadway]

Thanks,

Yeah, I have R21. I just haven’t checked with R17 but it should work on any version R16+.

Here’s a slightly improved version that handles undos better – you have to undo twice to completely reverse out of it.
13845_polygontocenterpointv0.0.2.zip

[Sam Treadway]

Here’s a python script I wrote specifically for this…mostly out of curiosity. I don’t know what’s changed in the python sdk between R17 and R21 so this may not work. You’re welcome to test it and let me know how it works out.

Run the script with one or multiple objects selected and with as many polygons as you wish per object – must be in polygon mode.
It will iterate through the selected objects and only apply the ops to individual polygons on the relevant selections.

You can also do this manually by:
1. selecting polygons
2. selecting the ‘extrude inner’ tool
3. setting the extrude inner options as follows (not absolutely necessary):
max angle: 180 (whatever)
offset: 0
subs: 1
preserve groups: off
variance: 0
create n-gons: off
4. After performing an inner extrude, then run the ‘collapse’ command (right click in viewport).

13843_polygontocenterpoint.zip.zip

[Sam Treadway]

1. Try starting C4D from the unix executable directly and keep an eye on the terminal output.
Look for any error messages during initial startup and look at the last lines before the crash.
“/Applications/Cinema 4D R21/Cinema 4D.app/Contents/MacOS/Cinema 4D”

2. If the freezes/crashes occur after a while while a particular project file is open, then start a clean scene and merge that project into it and save off a new version.

3. If it still crashes with a specific scene file after attempting #2 then try copying and pasting all the objects and materials from the scene to a fresh one and save the new file.

4. If this happens at random while any scene is loaded keep track of what tools you are using (screen record if necessary) and see if there is anything in common. It could be a single tool?

5. Move or rename your C4D preferences folder. A New one will be created on the next startup with fresh preferences.
Drop your plugins and script into the fresh profile and see how it runs after a while. It could be a corrupt preference.

6. To check if any other app running in the background are interfering: Create a new user profile on your Mac, log out of your current profile completely, and log into it. Start C4D without any other apps running and see what happens.

[Sam Treadway]

Move the texture tag from the cube to the cloner and switch the projection in the texture tag form camera map to flat.
Then in the Cloner’s attributes, on the Object tab, change the “Fix Texture” attribute to “straight”.

If you only want the images to appear on the front faces of the cubes then make the cube editable, select the front face in polygon mode and make a selection tag. With the texture tag on the cloner selected, drag the new selection tag to the “Selection” field in the texture tag’s attributes.

This is the simplest method based on the C4D file and texture you provided but there are several other ways depending on your setup.
For instance, if all the face images were individual image files then you could use a MoGraph MultiShader in the material and pull all the images in from a folder. Then randomize their clone attachment with a shader.

[Sam Treadway]

I think sometimes they aren’t properly notified when there is a response. Perhaps an issue with subscription setting.
But yes, there are some here who have asked numerous questions but rarely bother to follow up on any of them or contribute otherwise and it is annoying. This is true of any forum, unfortunately.

c4dcafe.com Is a better forum. This one is clunky and riddled with bugs and terrible design choices.

[Sam Treadway]

This is assuming you are on the color page and not Fusion:

For simplicity I’d have two corrector nodes set asside from the main nodes, each with their own keys.
Create a key mixer node by right-clicking in an empty area and pipe the blue matte outputs to the inputs of the key mixer.
Then pipe the output of the key mixer into your main flow of nodes.
Now with the key mixer node selected, open the key panel at the bottom (rectangle icon with stickman).
For each input you will see two buttons with circles representing key coverage (matte/mask controls — normal/inverted).

You can also reference the manual.
In DR16 see page 2340-2344

[Sam Treadway]

I don’t know then. As an alternative you could try exporting the cache as openVDB and then create an Arnold volume and link to that VDB.

[Sam Treadway]

Try following these instructions from the Arnold docs:
https://docs.arnoldrenderer.com/display/A5AFCUG/Turbulence+FD

[Sam Treadway]

This sounds like the correct behavior to me.
Are you instead trying to ‘disconnect’ the polygon?