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Any suggestions to See a beam of light.
Posted: 29 December 2012 02:50 PM   [ Ignore ]   [ # 16 ]
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Only one single cone light.
I’ll try to post something a little later. Need to open a few Carrara sessions.
One has great shadows, but some leakage. Some have crisp edges but bad shadows.
To get the wall to be very white I did turn up sub surface scattering, which might contribute.
Anyway I need to open these different sessions with different settings to show the different problems,
and I’m a little lost as to which is which. I have to go through them to post. Seening how it’s animated
I need to look through and find the frame that reveals the issue.
Though I am almost there with Barndoors and very very careful light settings to avoid any excessive
light spill to begin with.
Thanks
8068

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Posted: 29 December 2012 03:20 PM   [ Ignore ]   [ # 17 ]
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8068 - 29 December 2012 02:50 PM

Only one single cone light.
I’ll try to post something a little later. Need to open a few Carrara sessions.
One has great shadows, but some leakage. Some have crisp edges but bad shadows.
To get the wall to be very white I did turn up sub surface scattering, which might contribute.
Anyway I need to open these different sessions with different settings to show the different problems,
and I’m a little lost as to which is which. I have to go through them to post. Seening how it’s animated
I need to look through and find the frame that reveals the issue.
Though I am almost there with Barndoors and very very careful light settings to avoid any excessive
light spill to begin with.
Thanks
8068


Sub surface scattering is meant to mimic how light passes into something and bounces around. Maybe this is the source of your stray light. Try turning it off. If you need something super white, why not increase the intensity of the light? It would be faster to render and easier to set up.

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Posted: 29 December 2012 03:39 PM   [ Ignore ]   [ # 18 ]
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I think you may be confusing shadow intensity with shadow softness and light falloff, it’s important that you distinguish between them.

Joe is right that you should avoid a light passing through objects, which is what less than 100% shadows will cause.

You can soften the shadow effect by switching on soft shadows and setting a high enough diameter (most real world lights are about 4 inches or so wide from approx . 8 foot away). This is not the same as turning shadows down, the light will still be blocked by any geometry that should block it.

Set the angular falloff or distance falloff to give a softer edge to the light itself, or better yet use an IES profile. Lighting manufacturers provide free ones and there are utilities to produce your own. A lighting gel will do a similar job too. These soften the edges by limiting the light so, again, will not cause any extraneous lighting.

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Posted: 29 December 2012 03:43 PM   [ Ignore ]   [ # 19 ]
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8068 - 29 December 2012 02:50 PM

Only one single cone light.
I’ll try to post something a little later. Need to open a few Carrara sessions.
One has great shadows, but some leakage. Some have crisp edges but bad shadows.
To get the wall to be very white I did turn up sub surface scattering, which might contribute.
Anyway I need to open these different sessions with different settings to show the different problems,
and I’m a little lost as to which is which. I have to go through them to post. Seening how it’s animated
I need to look through and find the frame that reveals the issue.
Though I am almost there with Barndoors and very very careful light settings to avoid any excessive
light spill to begin with.
Thanks
8068

Dude, I’m sorry, but you’re doing work for a client, and from all I can tell from your descriptions, you have absolutely no clue what you’re doing. You turned up subsurface scattering to make the walls white?? And you don’t know why your shadows are so sharp?? Seems like you’re trying a bunch of stuff you don’t understand, and then surprised when it doesn’t work.

My suggestion:

Stop what you’re doing, tell us exactly what you’re trying to accomplish, show us some images, and we will try to help. But otherwise you’re just wasting people’s time.

And when you’re done with this project, pick up a book on basic 3D graphics and study it.

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Posted: 29 December 2012 07:13 PM   [ Ignore ]   [ # 20 ]
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Joemamma
With all due respect. You are not present don’t know the full story and your responses are unnecessarily harsh.
Since you asked for full details I will explain. Next time I suggest you just ignore assholes like myself.
The project is a combination learning experience for myself, and if it works out a gift for a friend. I used the term client
as short hand. This friend has a website with a flash animation of his logo. A light beam passing over a skylight in a hard black room.
I used the term client as shorthand for something I do not have creative control over. In other words I can’t add ambient light cover the leakage. This is a learning experience for myself. If it doesn’t work out it is only a favor for a friend. He didn’t even ask for it.

I made my first attempt and it was almost perfect and only took a few hours. One small issue. I saw light coming threw a wall at a camera.
Holly’s comment about 3d shadows fixed that as well. In a few minutes. When my friend requested the light stronger whiter on the wall there were other side effects. So I’m not totally lost. and I’m not charging anyone for any services. I’m pretty happy with what I’ve gotten with a few words or two of advice with this forum. I’ve experimented with different approaches to deal with the light, so what. I’m learning not complaining. I tend to keep my posts as short as possible and not bore people with why. I believe my last post thanked all the people that chimed in said I had what I needed to do pretty much figured out with there help, and had one question. My purpose for learning Carrara is simple technical animation, no characters, or world like scenes, but a few objects on a black background and lighting has rarely been much of an issue. This favor for a friend was a small departure. As well I just switched from Carrara 6 to 8 and some of the new features are not covered in the manual.
In any event, I thank everyone for the kind and helpful responses.
Happy New Year.

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Posted: 29 December 2012 07:31 PM   [ Ignore ]   [ # 21 ]
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Don’t worry about Joe, his bark is worse than his bite. If you can get through the sarcasm, he can have some good information. Just don’t tell him there could be another way to do something, or you will hear all about how everybody here doesn’t know their ass from a hole in the ground.

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Posted: 29 December 2012 08:07 PM   [ Ignore ]   [ # 22 ]
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I get frustrated because, as Evil so forcefully pointed out in another thread, you have to presume peoples’ time is precious to them. And when you get people, who are trying to help, running in 6 different directions, trying unsuccessfully to understand what you’re asking, that’s, IMO, rude.

As rude as you think I am in being short with you, is almost as rude as I think it is for people to raise unclear and conflicting questions, to people who are trying to help, using their own time, and in some cases, their hard earned skills and experience.

I don’t care if you give thanks, what I care about is that you are clear in the problem so we don’t waste our time running down rabbit holes. Okay?

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Posted: 29 December 2012 08:23 PM   [ Ignore ]   [ # 23 ]
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trolololololololololololololololololololololol!!

ah, now I feel better!!

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Posted: 29 December 2012 08:28 PM   [ Ignore ]   [ # 24 ]
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JoeMamma2000 - 29 December 2012 08:07 PM

I get frustrated because, as Evil so forcefully pointed out in another thread, you have to presume peoples’ time is precious to them. And when you get people, who are trying to help, running in 6 different directions, trying unsuccessfully to understand what you’re asking, that’s, IMO, rude.

As rude as you think I am in being short with you, is almost as rude as I think it is for people to raise unclear and conflicting questions, to people who are trying to help, using their own time, and in some cases, their hard earned skills and experience.

I don’t care if you give thanks, what I care about is that you are clear in the problem so we don’t waste our time running down rabbit holes. Okay?

Umm.. New Users do not know they are in a rabbit hole, they just need help that is helpfull, not somebody talking over thier heads WHO seems to have forgot that once in the past they were a New User that needed help also. What part of NEW USER that needs help because they need help dont you understand?

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Posted: 29 December 2012 08:32 PM   [ Ignore ]   [ # 25 ]
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wendy♥catz - 29 December 2012 08:23 PM

trolololololololololololololololololololololol!!

ah, now I feel better!!


Hey Wendy, I’m forceful with my wife as well! Wink! Wink! Nudge! Nudge! A nudge’ as good as a wink to blind man, eh? know-what-I-mean?!? Eh? Eh?  snake

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Posted: 29 December 2012 08:48 PM   [ Ignore ]   [ # 26 ]
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You’re right, Jaderail. I let my frustrations with this place get the best of me. I apologize to 8068. It was dumb of me.

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Posted: 29 December 2012 10:54 PM   [ Ignore ]   [ # 27 ]
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Hey 8068, don’t forget the option of fixing or blending two renders in post… wink

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