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Realistic Renders… NOT!! 12 “And we’re back in the room!”
Posted: 15 March 2013 06:11 AM   [ Ignore ]   [ # 61 ]
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http://bobvan.deviantart.com/art/453-359594166

*Nudity*  http://fav.me/d5y3cmf

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Posted: 15 March 2013 07:00 AM   [ Ignore ]   [ # 62 ]
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mark - 13 March 2013 01:02 PM

...

I am far from an expert on this, but this is my experience so far with 3Delight renders of indoor scenes:

If you are using UE indoors with mode set to “ambient” this produces renders that look like bad comic books. In “ambient” mode you have to turn UE down to a very low intensity and only use the UE light to contribute a small part of your light in order to get a decent result.

If you are using UE in “Occlusion w/Soft Shadows” mode, then you have to set trace distance parameter to about 100. I think the default is 500, which is good for outdoor scenes, but indoors it causes UE to create very dark scenes.

Recently I have been using a different way for lighting indoor scenes in 3Delight that does not use UE. The problem with lighting indoor scenes is creating the ambient light. You can put an UberArea light outside the windows to simulate the fact that real sunlight would be scattered and coming in the window from all directions, not just in the direction of your spot light or distant light. The Ambient light though would also reflect off the interior surfaces, especially any light colored surfaces. An unbiased render engine like Lux will trace all of that reflection off the interior surfaces, but 3Delight doesn’t do this very well.

In 3Delight you need to create artificial ambient light. This is what UE does, but I have discovered you can do the same thing with distant lights. A distant light with shadows turned off will go right through the walls and light up the interior. I set these ambient distant lights to be diffuse only, so they do not produce any specular highlights on anything.  I typically use 4 of them, set at Y rotations of 0, 90, 180 and 270 with a small negative X rotation so they are pointed slightly down. This gives me “ambient light” coming from all directions. You have to turn the intensity down on this lights to 10-30% range depending on how much ambient light you want in the room. I have also added one distant light pointing straight up to get some “ambient” light on the ceiling.

As I said, I’m far from and expert, but I have like the results I’ve gotten using distant lights coming from all directions to model both indoor and outdoor ambient light.

Excellent advice. I’ve noted that the default in Studio 4.5 for maximum trace distance has been lowered to 150. Perhaps for this reason…but it also makes rendering a little faster.

For people who aren’t as wedded to 3D renders looking, well, real, there is the matter of the building walls and roof. You can set them to not cast shadows and that lets the light flow in unimpeded. Often model makers make walls and the roof ‘removable’ for camera angles. If you utilize that, it also causes the sunlight, from whatever source, to enter the space.

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Posted: 15 March 2013 07:11 AM   [ Ignore ]   [ # 63 ]
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just playing around with the materials for the Luxus plugin.

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Posted: 15 March 2013 09:08 AM   [ Ignore ]   [ # 64 ]
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Looking good,

There’s hardly any grain there at all, how long did it take?

CHEERS!

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Posted: 15 March 2013 09:09 AM   [ Ignore ]   [ # 65 ]
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Rogerbee - 15 March 2013 09:08 AM

Looking good,

There’s hardly any grain there at all, how long did it take?

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oh I let it run over night so 9 hours or so

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Posted: 15 March 2013 09:12 AM   [ Ignore ]   [ # 66 ]
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Pretty decent for that amount of time. How does it compare to a Reality render left for that long?

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Posted: 15 March 2013 09:36 AM   [ Ignore ]   [ # 67 ]
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I just want to thank Bobvan for the tip about Callad of Reality.
http://www.sharecg.com/pf/full_uploads.php?pf_user_name=callad
There are some nice goodies there.
I have also found Jaderail’s free Golden Rules Camera Prop v1
http://www.sharecg.com/v/67783/related/21/DAZ-Studio/Golden-Rules-Camera-Prop-v1

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Posted: 15 March 2013 09:37 AM   [ Ignore ]   [ # 68 ]
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No problem I will no longer be offering advice and posting or dealing getting / Luxus. I think then Vendor needs to have thicker skin.. It’s a long story & I don’t want to get into it but will gladly offer Luxrender advice / tips.

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Posted: 15 March 2013 09:41 AM   [ Ignore ]   [ # 69 ]
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Rogerbee - 15 March 2013 09:12 AM

Pretty decent for that amount of time. How does it compare to a Reality render left for that long?

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I dunno, I don’t have the reality plugin, besides they both use the same renderer Lux..

as for using the 3delight, didn’t try it, because there is alot more fiddling to try and get the same result.

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Posted: 15 March 2013 09:42 AM   [ Ignore ]   [ # 70 ]
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Glass can take a while to clear up but if one uses the refine brush it can speed up the process quite a bit. I use it for other areas as well along with some minor PS postwork

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Posted: 15 March 2013 09:47 AM   [ Ignore ]   [ # 71 ]
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Bobvan - 15 March 2013 09:42 AM

Glass can take a while to clear up but if one uses the refine brush it can speed up the process quite a bit. I use it for other areas as well along with some minor PS postwork

I haven’t played with that yet, still reprograming brain back to photographic lighting mode for use with Luxrender.

also playing with textures available to see how they affect the scene as a whole. 

the scene was also rendered inside a box but it was a 20m box so no light relfection off the sides that I could tell..

doing a new scene with a smaller box (room) and texture that should relfect more light into the scene from the lone spotlight.

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Posted: 15 March 2013 09:49 AM   [ Ignore ]   [ # 72 ]
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Thats one of the things I like about Lux is the lighting once you get used to it you will see how much better it works adjusting it as you render film response is another thing you want to get to know.

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Posted: 15 March 2013 09:53 AM   [ Ignore ]   [ # 73 ]
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Bobvan - 15 March 2013 09:49 AM

Thats one of the things I like about Lux is the lighting once you get used to it you will see how much better it works adjusting it as you render film response is another thing you want to get to know.

well I know ISO, F-Stop, Shutter Speed etc.. been a photobug for decades now, only went DSLR in the past 5 years so that stuff is familiar to me..

the whole gamma correction thing discussed in the luxus thread I need to play with…

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Posted: 15 March 2013 09:55 AM   [ Ignore ]   [ # 74 ]
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Dont use Luxus so i would not know seems to be getting a good fan base. I am used to my work flow so I am staying with what works for me sides R3 will be here soon..

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Posted: 15 March 2013 10:01 AM   [ Ignore ]   [ # 75 ]
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Bobvan - 15 March 2013 09:55 AM

Dont use Luxus so i would not know seems to be getting a good fan base. I am used to my work flow so I am staying with what works for me sides R3 will be here soon..

well do you tweak the gamma when using the Linear tone mapping?

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