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[C4D] General Discussion / Re: Layering Alpha Channels with Different Mappings
« on: 2018-11-14, 20:21:40 »
Oh, sorry, Cinema 4D R19, with Corona B2 (core 3).
2024-04-23, 21:47:01
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32
[C4D] General Discussion / Layering Alpha Channels with Different Mappings
« on: 2018-11-14, 19:34:33 »
I'm trying to fake some headlight fog with a series of layered shaders. First, I have a layered material that contains a white diffuse/fresnel opacity shader, with an additional opacity gradient on top to make it fade out as it leaves the headlights. This part works fine:
However, I also want to add a fade just as it touches the road to avoid a hard transition. The trick is that it needs a separate mapping, since the cones are using a cylindrical map and I need to do a flat map to align with the road:
The problem I run into is that I don't know how to combine these two together in a way that merely adds the second alpha fade to the original headlight layered shader. I tried making it a second material tag mixed on top of the first, but that only gave me stuff like this:
Any ideas? Thanks!
However, I also want to add a fade just as it touches the road to avoid a hard transition. The trick is that it needs a separate mapping, since the cones are using a cylindrical map and I need to do a flat map to align with the road:
The problem I run into is that I don't know how to combine these two together in a way that merely adds the second alpha fade to the original headlight layered shader. I tried making it a second material tag mixed on top of the first, but that only gave me stuff like this:
Any ideas? Thanks!
33
[C4D] General Discussion / Re: Corona Renderer for Cinema 4D Beta 2 Release Candidate
« on: 2018-10-12, 15:15:11 »Thank you for the scene! We successfully reproduced the issue and will fix it ASAP.
OK, fixed! You can expect the fix to appear in RC3. Thank you again for the scene! With it, we were able to pinpoint the problem very quickly
Happy to help! Thanks!
34
[C4D] General Discussion / Re: Corona Renderer for Cinema 4D Beta 2 Release Candidate
« on: 2018-10-11, 16:50:07 »
I was testing the motion blur improvements when I ran across a new glitch, as far as I can tell. Turning on object motion blur in a scene I have with a stationary, non-cloned/noninstanced car and a stationary camera appears to shift all the car pieces from their original location.
Since nothing is moving at all, this seems like a good scene to narrow down issues. Scene and renders attached.
Since nothing is moving at all, this seems like a good scene to narrow down issues. Scene and renders attached.
35
[C4D] General Discussion / Re: Corona Renderer for Cinema 4D Beta 2 Release Candidate
« on: 2018-10-05, 15:35:38 »
Yes, we're working on it...
Great, thanks! Didn't mean to be redundant, just double checking.
36
[C4D] General Discussion / Re: Corona Renderer for Cinema 4D Beta 2 Release Candidate
« on: 2018-10-04, 19:14:44 »
I take it this issue is still in the bug list, as per your post in that thread a week or so ago? Are there plans to try to tackle it before Beta 2 release?
https://forum.corona-renderer.com/index.php?topic=21299.msg134838#msg134838
Thanks!
https://forum.corona-renderer.com/index.php?topic=21299.msg134838#msg134838
Thanks!
37
[C4D] General Discussion / Re: May 30 Daily Build and Motion Blur
« on: 2018-09-27, 15:12:03 »
I very much appreciate your responsiveness and hard work. Thanks!
Unfortunately, turning off render instances makes this scene un-renderable on most of our computers, but it's good to know that's an option to avoid most of the problems temporarily.
Unfortunately, turning off render instances makes this scene un-renderable on most of our computers, but it's good to know that's an option to avoid most of the problems temporarily.
38
[C4D] General Discussion / Re: May 30 Daily Build and Motion Blur
« on: 2018-09-26, 18:01:47 »
There are definitely some weird things going on re: motion blur and cloners. I have a rather complex grass-and-hills scene, where if I check the "object motion blur" option my road object starts to get really funky looking. In addition, random clones still lack motion blur frame to frame. I haven't gotten any crashes with motion blur lately though, so that's an improvement.
Overall I've been considering object motion blur broken for multiple builds now, and have only been using camera motion blur.
Attached are two renders: One with only camera motion blur on, the other with camera and object blur on. As you can see, as soon as object MB is enabled clones start losing textures, turning weird angles, and randomly missing MB as seen on one grass patch to the right.
Unfortunately I don't have time to simplify my scene, but I'll link it anyway. It has a similar setup to BigAl3D's endless road scene, just with more moving parts. It's also too large for the uploader, so I'll throw it on my google drive.
https://drive.google.com/open?id=18T32h3nVUBH2ew0IUJtWhN1NYaRqR6Vy
If indeed the issue is related to lots of items attached to a cloner, particularly one doing repetitive cycles on a spline, I don't know if simplifying the scene too much would defeat the purpose.
Overall I've been considering object motion blur broken for multiple builds now, and have only been using camera motion blur.
Attached are two renders: One with only camera motion blur on, the other with camera and object blur on. As you can see, as soon as object MB is enabled clones start losing textures, turning weird angles, and randomly missing MB as seen on one grass patch to the right.
Unfortunately I don't have time to simplify my scene, but I'll link it anyway. It has a similar setup to BigAl3D's endless road scene, just with more moving parts. It's also too large for the uploader, so I'll throw it on my google drive.
https://drive.google.com/open?id=18T32h3nVUBH2ew0IUJtWhN1NYaRqR6Vy
If indeed the issue is related to lots of items attached to a cloner, particularly one doing repetitive cycles on a spline, I don't know if simplifying the scene too much would defeat the purpose.
39
[Max] Resolved Feature Requests / Re: True Sunsets
« on: 2018-08-31, 16:57:41 »
I hadn't raised my ambitions to a full 24-hour daylight system, but that would be fantastic. Especially having moon and star controls.
40
[C4D] General Discussion / Re: Fading out a sky?
« on: 2018-08-31, 15:58:16 »
Hm, certainly a starmap layering into an HDRI is feasible, but the trick is when you need the sky to interact with the sun. An HDRI won't become any more "daylike" as the sun rises, whereas the actual sky object will.
Is your day sky an HDRI or the actual corona sky object/shader? If it is the corona sky, how did you get it to be totally transparent at the start?
Is your day sky an HDRI or the actual corona sky object/shader? If it is the corona sky, how did you get it to be totally transparent at the start?
41
[C4D] General Discussion / Fading out a sky?
« on: 2018-08-30, 19:51:44 »
I'm attempting to create a day-into-night timelapse scene, and I'm running into an issue trying to get a smooth transition between the Corona sky and a second sky with a starfield light shader.
I currently have the following set of relevant objects:
Sky_Day: A typical sky object with the Corona sky tag on it
Sky_Night_Stars: A sky object with an emissive starfield shader, with a Corona compositing tag that prevents the stars from affecting the GI or cast shadows
The main issue is that I can't find a way to fade out the visibility of the Sky_Day object. A C4d visibility tag doesn't seem to affect it in any way, and while the Corona compositing tag has a "seen by camera" checkbox, that's a very harsh on/off function. Ideally I need to fade it out over a few seconds to cover the sunset period. Turning down intensity and turbidity seems to reduce the sky to a near-invisible level, but it doesn't allow the stars to shine through as I'd hoped.
Any suggestions would be greatly appreciated.
I currently have the following set of relevant objects:
Sky_Day: A typical sky object with the Corona sky tag on it
Sky_Night_Stars: A sky object with an emissive starfield shader, with a Corona compositing tag that prevents the stars from affecting the GI or cast shadows
The main issue is that I can't find a way to fade out the visibility of the Sky_Day object. A C4d visibility tag doesn't seem to affect it in any way, and while the Corona compositing tag has a "seen by camera" checkbox, that's a very harsh on/off function. Ideally I need to fade it out over a few seconds to cover the sunset period. Turning down intensity and turbidity seems to reduce the sky to a near-invisible level, but it doesn't allow the stars to shine through as I'd hoped.
Any suggestions would be greatly appreciated.
43
[C4D] General Discussion / Re: What is corona sun object ´textured´ ?
« on: 2018-08-29, 23:21:18 »
Dang, yeah I'd heard as much so when I saw this animation I was quite surprised. Oh well.
44
[Max] Resolved Feature Requests / True Sunsets
« on: 2018-08-29, 21:25:32 »
I would like to suggest some mechanic for true sunsets. As per this thread I'm under the impression that the current simulation does not support the sun being below the horizon. But as a result, there's no ability to make a true sunset. The Corona sky remains lit and the sun is still visible, whereas it would be ideal if there were some way to have the sun dip below the horizon and the Corona sky fade to black. Maybe an extra 5 degrees of angle below the horizon?
Or, alternatively, allow regular lights to affect the Corona sky shader/setup so that you could fake a sun that can go wherever it wants.
Or, alternatively, allow regular lights to affect the Corona sky shader/setup so that you could fake a sun that can go wherever it wants.
45
[Max] I need help! / Re: Sun Below Horizon [C4D]
« on: 2018-08-29, 20:55:28 »
Ah, thanks Njen. I'd searched this forum but hadn't checked the bug forum.
I'll reply in the other thread to keep things together.
Edit: https://forum.corona-renderer.com/index.php?topic=21594.0
I'll reply in the other thread to keep things together.
Edit: https://forum.corona-renderer.com/index.php?topic=21594.0