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Topics - BigAl3D

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[C4D] Bug Reporting / Possible Glitch in v7 January 22 Build
« on: Yesterday at 18:16:43 »
I started using the latest daily build and noticed something wrong. I've setup a simple scene with a shadow catcher to use as an environment as I add Corona materials to my 3D cars. All of a sudden, the Sky Object is rendering when I've set it to NOT be seen by Camera. I know this because the Background Object no longer renders at all, thus revealing the HDR in the background. I'll be uploading a scene after I post this.

As you can see in my image here, the render in the top-right is correct. The image in the bottom-right is the exact same scene with no changes, but rendered with daily build January 22.

A simple workaround is I put a curved studio object (floor that curves up behind my objects) and applied my shadow catcher material. This renders as expected.

Build timestamp: Jan 22 2021 18:59:59
Version: 7.0 daily Jan 22 2021
Cinema version: R20.059 CINEMA 4D Studio

[C4D] Bug Reporting / Deleting Multiple Material Tags Crash
« on: 2021-01-24, 19:06:26 »
I've run into this crash many times now. Today, I created a quick house floor plan visualization for a friend. Fairly small project. I added a few generic models to fill out the space. There are some C4D native materials mixed in as well. In this scene, I moved the group of objects to the top to make things easier to find (called These Materials). I wanted to delete all the material tags (Corona materials) and just apply one simple material to the parent null using Cubic. I selected all the tags, hit delete and crash. Every time I tried it crashed. I then tried deleting one tag, no problem. I deleted five tags. No problem. I also tried 10 without issue. When I deteted 15 tags, it crashed. I don't think this is a major issue, but shouldn't be happening nonetheless.

This happened with the December and the new January Daily Builds. I have not tried it in v6 stable release. I also have not tried these sequence with a plain C4D scene with no Corona elements.

I will now upload the project file and bug report to the private uploader. The regular uploader either didn't work or was too slow and timed out, at least the Captcha was timing out. I used the Dropbox method. The file is called "Alex Campuzano_Corona 7 Crash" 140MB.

Gallery / Virtual Showroom
« on: 2021-01-24, 01:52:39 »
I still have a ways to go, but I'm happy with how this came out. We only had a week to do the 3D (the showroom, lights and all the cars) all the green screen (all actors), record and master the audio and make five different version. Given, that, it's pretty good. 9 out of 10 people had no idea it was fake, so that's a win in my book. There are a couple spots where the car was moved slightly, but the shadow wasn't adjusted, but when watching TV, you'll never notice that with all the action elsewhere. The render did have a red panel where that UPGRADE banner is, so that explains the darker shade on the ceiling there.

[C4D] General Discussion / Layers and Fresnel Question
« on: 2021-01-22, 15:19:28 »
For car paint, I've been using the layer material with a base, flakes and top coat materials. On the layers window, the flakes and the coat materials have a Fresnel in the Mask section. My question is, does that Fresnel mask provide the same function as if it was used directly in the reflection channel of a material? I think it does, but wanted to make sure.

[C4D] General Discussion / Node Editor
« on: 2021-01-14, 23:53:39 »
I asked this question on YouTube, but didn't get an answer so here it is again. Great tutorial on the Node Editor if you haven't seen it yet. 

One question on the ability of Corona's Node Editor to parse C4D's reflectance materials. I know the converter doesn't do well with these materials, but how important is it to convert the materials from an old project to Corona materials? I mean the Reflectance workflow can produce very nice results too. Do they render the same in Corona as in the Physical Renderer? Will they slow the render time? Just curious.

So I always see Max tutorials using a dome lighting system and that may be implemented into C4D as well. What are the differences between the two?

[C4D] Daily Builds / Why Is the New PBR Better?
« on: 2021-01-02, 20:20:20 »
Are there any examples of why the new PBR system is superior than before? Just curious. Seems like a major change and wanted to understand it better. Thanks.

[C4D] General Discussion / Light Object vs. Light Material
« on: 2020-12-28, 16:05:01 »
Aside from IES capabilities, is there any reason I should use one or the other types of light for bunch of ceiling lights in a large interior? Here is a close to final render (only 10 passes) so you can see the context.

I can't remember if C4D has a feature like this or not. Say you have a Cloner set to Grid Array and a complex model. Is there a way to tell C4D or Corona, at render time, to reduce the resolution of the most distant meshes to reduce render times? I don't know if Corona itself has anything like that. For my situation, I have a bunch of car models outside, in a large dealer parking lot. When some of the cars are in the distance, clearly, I don't need crazy detail in the mesh or in materials such as displacement.


[C4D] Daily Builds / Impressed with v7 Stability
« on: 2020-12-10, 16:58:04 »
So far, I'm happy to say v7 latest daily build has been very stable for me. Even better is the performance of the Interactive Rendering feature. Even on this old Trashcan™ Mac Pro, I'm able to navigate my scene with pretty snappy updates in the IR window.

Now let's fix or add those features that have been lingering for ages so you can honestly call this a "new" version. Oh yeah, and the sample library and a full help system, and... Just trying to motivate. ;-)


Mac OS 10.15.7 Calatina, 2013 Mac "Pro", Cinema 4D r20

[C4D] I need help! / Interactive Viewport Different
« on: 2020-12-09, 16:30:13 »
What could be the cause of the Interactive Viewport rendering darker than the VFB or the final render? I'm using an HDRI in the Corona Sky Object. Sometimes, not all the time, the interactive viewport, which I love to use, will simply render much darker than the other forms of rendering in Corona. I've tried turning on and off Photographic Exposure, I've tried matching the Corona Camera settings to the camera settings in the C4D render settings. Any idea where to look for a fix?

Not sure if this is a bug or not, but I'm getting fairly regular crashes with Team Render Client on Windows 10. Overall, it's working well, but I will almost always get a crash. The renders are being controlled/launched from my Mac. I have two dedicated render boxes running the latest Windows 10 (not sure of the pack). A window will come up with something like "Corona plugin has crashed." I've attached the Bug Report. Seems to happen with different scenes as well.

[C4D] General Discussion / Another Shadow Catcher Question
« on: 2020-10-31, 00:28:05 »
Since the help system is still mostly non-existent, I figure I'd post the question here. I'm rendering some cars with a shadow catcher set to "For Compositing." I like being able to get a car with the shadow included in the Alpha Channel. The only problem is, the shadows always seems a little too dark. I see the option of "Shadow Amount" but it doesn't seem to do anything. I'd love to be able to render as one file sometimes, but I can't seem to adjust the shadow. Anything I can do or this feature not fully implemented?

[C4D] General Discussion / Backplate Composting Question
« on: 2020-10-15, 19:01:34 »
So when adding an object to an image using the Shadow Catcher for shadows, I'm currently using some free HDRs in the Corona Sky object for lighting which are in the equirectangular format I presume. Now, the compositing effect works great, but the image is distorted since it's using the spherical projection. This is good for lighting and reflections, but not good for the final output since it's warped and often very soft and not sharp. What's the workflow to use the HDR for lighting and reflections, but use a proper, undistorted backplate image for compositing?


[C4D] General Discussion / Corona v6 New Features
« on: 2020-08-31, 18:33:19 »
I just saw that posted the new features videos for v6 which is nice. I have one question though, can someone explain what "Propagate Masks in Reflection and Refraction" actually does? The video is unclear to me. Thanks.

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