Topics

1

[C4D] I need help! / Caustics not Visible in Photoshop

« on: 2021-12-28, 03:49:37 »

Hi there,

I tried out the fast caustics solver and i love the results.

Unfortunately, due to my incompetency, I don't get why they are not visible in my Photoshop file ( see attached image ).

I saved the file as a 16bit PNG with Alpha Channel

When i save it out as an EXR, the caustics are visible, but there is no Alpha channel.


I also tried "caustics only in caustics pass" but i didn't see further options when saving the file, nor a "caustics only" pass in the picture viewer

Thanks!
Andrej

2

[C4D] I need help! / Corona Decal - Tutorials?

« on: 2021-12-16, 21:35:02 »

Hi there

Since Corona Decal has been added to the most recent Cinema4D Version 8 Daily build, i am eager to find out how to use it, but i can't find any resources online how this feature works, not even for 3DsMax-

Maybe i'm not good at finding what i am looking for, but that it's burried so deeply?

Help would be appreciated!

Thanks!

3

[C4D] I need help! / Global Volume (Fog) reduces & removes Hdri Reflecions

« on: 2021-11-26, 17:58:48 »

Hi there

Not quite sure if my settings are incorrect, if this is a limitation to Corona, or if Light really works like this (which i don't think)

Long story short, when I add global Volume for a Distance Fog effect, the Hdri Reflections on the ground (see attachment) dissappear, but are still visible on the car though.


I tried "Single bounce only" in the Volume shader settings checked & unchecked.


There are no funky "general" render settings, Overrides or compositing tags added to any objects.


On my screenshot, the left half of IR is with the Global Volume turned on, the right half of IR is with Global Volume turned off --> see the difference on the ground reflections of the Hdri

( P.S: i could solve this by adding a huge Box object in the back of the scene and add the volume shader to it instead of a Global Volume, but i don't know how to get a gradient "density" effect -> the "edge" of where the volume starts is visible on the ground)

Any help would be appreciated!

Thanks!

4

[C4D] Feature Requests / Bitmap / Node preview Node / Node Wrangler from Blender

« on: 2021-11-23, 02:13:58 »

What would be super awesome, is something similar to the node wrangler from blender.

Basically what it does, is lets say you have a couple of bitmaps and noises mixed, and you want to see what the output looks like of those textures.

You hold CTRL + SHIFT and Click on the node you want to preview -> Blender automatically inputs the selected node to a temporary "viewer Node" ( probalby like an emission output )
It's not affected by lighting or such ( see the attached screenshot in the file - i used no lighting, to showcase the visibility )

From what i can see there have been multiple requests to have the maps visible in viewport for a couple of years now.

This "Node Wrangler" concept would be also super useful, as it also quickly shows the look of bitmaps, without manually having to input the bitmaps to the diffuse, probably turn off "reflection" or "refraction" and such, to go back and see the output, and then repeat until the desired look/mapping is achieved.

That would save a lot of time, and ( please excuse if i am talking crap right now, i have no idea of programming and such ) doesn't seem to be too big of a problem to implement, since a user has also made this addon to work with octane in blender as well.

here is a quick overview of what it does.

( there's also a feature to quickly connect diffues / roughness / normal maps to the right inputs with a shortcut )


Would really love to see such a feature, since bitmap / mixture shader previews have already been requested for a while now for corona


Thanks!

5

[C4D] I need help! / How to extend / clip Bitmap

« on: 2021-11-23, 02:00:07 »

Hi there,

still a pretty new user to Cinema4D and Corona Rendered

How can one set up a bitmap, without it repeating/tiling?

I am not talking about randomizing the tiling in general, but in the picture i attached to this post, you can see a Porsche emblem on a rim, and i only want it once, without it repeating at the outer boundries of the specific area where the main emblem is mapped.

In blender for example, you can set up each texture, if the texture should repeat itself outside the UV Boundries, or if it should extend, or clip.

I hope this makes sense.


Thanks in advance!

6

[C4D] I need help! / New User needs help / Normal Maps barely visible

« on: 2021-11-08, 18:29:08 »

Hi there!

Long story short, been working with Blender for 3 years now, and just started out with Corona in Cinema4D, i noticed some issues concerning effect Normal maps have. They are barely visible (in my case)


I posted 3 Pictures, one is the (desired) result in Blender Cycles with the same Normal map, one picture with the result in Corona, and a third with the Corona Node Editor settings.
I tried to have similar lighting and angle for the screenshots


Troubleshooting:

-I have already checked if the Green needs to be inverted

-I Plugged the Bitmap to a Normal and this node then to the Bump channel

-I used Linear colorspace opposed to srgb or embedded Profile

-It's a DirectX Normal Map

-How can i adjust the Strength of the normal map in general?

-scaling of the model (Tire) is true to real world scale

I am sorry, if this is a repeated question, but i couldn't find any solution yet.

Thanks in advance!