Topics

1

[C4D] Bug Reporting / Decal on glass, big refraction problems

« on: 2025-03-19, 18:31:26 »

I've been working on a bottle project, where I had set up the glassware to use decals for the embossing (only effect displacement). I thought it as working reallly well and giving me lots of control, until i realised that if the decal is not appllied the refraction looks completely different!

Decal with bump instead of displacement it still wrong. But UV mapping and applying displacement via the material  works as expected - so it seems to be a decal issue.

Sometimes you hardly notice, but sometimes it is VERY different. It seems to be buggering up the IOR value of either the glass or somehow the volumetric liquid.

I can't share the real files so there's a simple scene attached below.

Unfortunately this means deacals cannot be used on transparent materials properly.

2

[C4D] I need help! / NO LICENCE AVAILABLE!

« on: 2025-03-10, 13:14:13 »

Corona is not activating despite there clearly being a licence free on the licence server.
Corona is updated as is the licence server. No help.
Have submitted a Help centre ticket which says: "'Please note: We are currently experiencing high ticket volume, which may result in longer response times than usual—currently 3-4 days. Our team is working diligently to get to your ticket as quickly as possible.'

WTF! I have deadlines today! 

3

[C4D] General Discussion / Denoise after render

« on: 2025-03-04, 17:47:08 »

 I ave some shots that really need denoising in some areas but have other fine detail that is lost if I denoise. So id like to render once, denoise a copy and then comp it with the un-denoised version. Is this possible? From CXR perhaps?

4

[C4D] I need help! / Missing refraction distortion - BUG?

« on: 2025-02-14, 10:49:20 »

Hi - I have a fairly niche setup, where I'm placing a piece of distorted glass in front of the camera to deliberately cause ripples and distortions in the scene.

This was working fine, and is still working in the interactive viewport, but when I come to render properly the effect disappears.

Any ideas?? What is going on or if it's a bug?

(The glass panel is a legacy material, no reflection, distortion contolled by noise).

Win11 C4d 25 1.2 corona 12.1.1

5

[C4D] Bug Reporting / Crash if adjustments made to Corona sky shader

« on: 2025-01-10, 11:48:20 »

I've been living with this for a while - but it seems to be getting worse...

When using an HDRI in the SKY object, if I try to make an adjustment to the HDRI using Cinema's 'Filter' or Çorona's 'Colour correct' then the machine almost always crashes immediately.

It was happening in C4D 2024 and is now happening in C4D 2025 (all latest versions). In corona 12 and 12.1.

PC. with win 11, AMD Ryzen 9 7950X, NVIDIA GeForce RTX 4070, 64 GB RAM

6

[C4D] I need help! / SSS dark lines :( combine 2 materials?

« on: 2025-01-06, 13:12:56 »

Halloo. I have a hand model which has one material for the skin and another material for the nails. They are added via polygon selection tags. Unfortunately having two SSS materials means I get the dreaded dark lines at the seams.

Do you know how I can combine the two materials into one to avoid getting the lines?
There are no opacity masks to use in the layered material shader unfortunately.

7

[C4D] I need help! / Change in behaviour - shader settings

« on: 2024-10-22, 15:53:01 »

Hola.
When loading a bitmap into the texture slot of a material, there were always 3 buttons next to it. I used the Edit Texture & Reload Texture buttons almost constantly in my workflow to edit linked PSD files and make sure they were reloaded afterwards.

Since updating my software, they seem to have been replaced by the enigmatic and much less useful Create Shader and Select Shader buttons.

Does anyone know if the C4D 2025 update did this? Or is an update to Corona 12.

If it's Corona, please change it back :)

8

[C4D] I need help! / OSl flakes in C4D corona??

« on: 2024-09-10, 15:23:02 »

Hi - I've been trying to load a OSL shader into the normal slot to make a carpaint flakes type shader....With absolutely no succeess.
Are OSL shaders supported in the c4d version? If so what is the method? I can't find much in the doce...

9

[C4D] I need help! / Help! Blocky artefacts from sunlight

« on: 2024-07-30, 12:56:37 »

I have a scene wih a directional sunlight (physical sun) on a wall. For some reasoin it is causing square artefacts on the wall (see pic).

I have tried changing the wall geo/phong/materials. Plus changing to solver to 4k/path tracing. Plus copying everything into a new file.  Nothing seems to help.

Any ideas?

10

[C4D] General Discussion / New VFB - where is the pass dropdown?

« on: 2024-07-13, 19:58:25 »

Have I missed something?  My toolbar doesnt seem to have the pass dropdown to switch between beauty/alpha/id etc. Legiblity and usability is better in the old VFB I'm sad to say.

11

[C4D] I need help! / Max to c4d - preserve materials?

« on: 2024-03-12, 17:33:31 »

Hi. It's probably been asked before - but is there a way to get a 3dsmax scene (corona materials) into Cinema4d (also with corona materials).

I dont expect a perfect material match - just to have maps linked to the right object.

FBX exports the geo fine. But with no maps in the materials. It would take me an enormous amount of time to compare files and rebuids from scratch. Please tell me theres another way :(

12

Hardware / Very noisy new ryzen build

« on: 2024-01-10, 09:44:42 »

I've just completed (I hope!) my first PC build.

Its a Ryzen 7950X, built one a ASUS ProArt X670E, with Noctua NH-U12A cooler, plus 4 case fans (three at the front, one at the back) in a Fractal North case.

I set the fan curves to quiet in the bios, and also tuned and set them to AI cooling in the armory crate app.

It's silent when idle. But as soon as I use use IRR or viewport rendering the fans kick in quite high and very noisy. The CPU temp is straightaway 75-80º.

Have I messed up my cooling somewhere? Or the fan setup? Or is it just a noisy build?
My co-workers are grumbling a bit :( as my previous PC was always almost silent.

Hopefully someone can give me some pointers. Thanks in advance.

13

Hardware / Amount RAM Needed?

« on: 2023-11-27, 21:21:42 »

Forgive my ignorance. I'm thinking of building my first PC around a 7950X. But on my local shop's part picker - it keeps limiting me to 64GB of DDR5 RAM on the motherboard.

Is there something about DDR5 RAM that is limiting it to 2 slots? Is 64GB remotely enough these days?
I always thought that Corona was somewhat RAM hungry so my old 2950X pc had 128GB of DDR4...

14

[C4D] Bug Reporting / Layer & select material. Copy paste loses linked materials

« on: 2023-10-18, 17:42:15 »

When copy and pasting either corona layered or corona select material between files, the linked materials are not carried over.

For instance I have a sphere with 4 alternative coloured materials set up in a corona select material. After pasting, the slots are empty and need to be manually re-added.

C4D's File>Merge works fine, but then it brings over other lights etc that you may not want from the original scene.

(windows 10, c4d 2023)

15

[C4D] Feature Requests / Stupid simple fix? CIE naming

« on: 2023-09-13, 09:52:40 »

I know its pretty trivial. But when saving from the Corona Image Editor, the un-abbreviated file format naming is difficult to scan read. And more often than you'd hope, I select the wrong one by accident.

Can we just use standard naming conventions please :)
ie just 'TIFF' instead of the unwieldy 'Tagged Image File Format'

Heres to a simple life!