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starbase1
08-18-2008, 12:10 PM
Well, I'm operating largely by trial and error here, but once I finally got the light to show it worked well.

I just plonked it on the ceiling, top left of image, added a bit of final gather and an object chosen pretty much at random, and this is what came out. Given my appalling track record on interior scene lighting, I'm very chuffed!

Nick

starbase1
08-18-2008, 12:20 PM
And while I am at it, is there a way to save these lights as presets or something?

Mitja
08-18-2008, 12:50 PM
What a cool object this is!!! The light is too strong though, at first I thought there was a window on the left.

starbase1
08-18-2008, 02:00 PM
Yes, I think turning things down would help, and maybe cranking up the strength of the radiosity. But for a first proper image I was pleased!

The object was made in the wonderfully weird Xenodream, which is astonishing at making strange 3d fractal objects. Well worth exploring if you like oddball abstract things!

Nick

mav3rick
08-18-2008, 04:24 PM
subdivision of object?

starbase1
08-18-2008, 04:25 PM
OK, scene with light, ies file, and objects included are attached for anyone to play with.

Please show and share what you come up with!
(But no-one ever does... :thumbsdow :thumbsdow :thumbsdow)

Nick

BigHache
08-18-2008, 10:36 PM
That's really randomly cool.

I'm working on re-rendering a scene I did a couple of years ago, now with IES files from the fixture manufacturers. My scene has 31? Photometric lights in it.

starbase1
08-19-2008, 12:50 AM
Alternate render...

Mitja
08-19-2008, 01:47 AM
Here is my try.
61956 61957
I just changed the photometric light to the DPweb light (it reads more ies formats).
And changed some GI settings, which were pretty strange.

starbase1
08-19-2008, 05:14 AM
Here is my try.
61956 61957
I just changed the photometric light to the DPweb light (it reads more ies formats).
And changed some GI settings, which were pretty strange.

That's better than mine!

Could you attach your scene file, so I can see which GI settings you changed?

Mitja
08-19-2008, 05:27 AM
I changed this settings:
intensity: from 99% to 150-200% (depends on the ies light you choose)
indirect bounces: from 1 to 6
rpe: from 64 to 128
sbr: 32
That's it.

starbase1
08-19-2008, 05:41 AM
I changed this settings:
intensity: from 99% to 150-200% (depends on the ies light you choose)
indirect bounces: from 1 to 6
rpe: from 64 to 128
sbr: 32
That's it.

Ah, most of those I held down to keep the render time under control.
Indirect bounces sounds very high to me, can you really seee the difference with that? And does it not send render times sky high?

Nick

Mitja
08-19-2008, 05:50 AM
Render time was about 4 mins for the 2nd image (800x600, 5 ies lights), it's not that much.
Indirect bounces don't rise rendertimes, since it's FG. I could have leaved rays at 64 and 16, but then you start to see splothes.
But it was just a test!

starbase1
08-19-2008, 07:08 AM
Render time was about 4 mins for the 2nd image (800x600, 5 ies lights), it's not that much.
Indirect bounces don't rise rendertimes, since it's FG. I could have leaved rays at 64 and 16, but then you start to see splothes.
But it was just a test!


Mine too! I'll give your settings a go, (and read 'exception's radiosity guide again!)

virtualcomposer
08-19-2008, 09:47 AM
Hey that looks great. I had an idea. If you had an image of a person reflecting in the front of it, it would add to the realism I think. It would make it look like it's in a museum. Just a thought. Also, try adding some light fixtures to help make the lights seem more real...like it's coming from somewhere.

starbase1
08-19-2008, 12:49 PM
Hey that looks great. I had an idea. If you had an image of a person reflecting in the front of it, it would add to the realism I think. It would make it look like it's in a museum. Just a thought. Also, try adding some light fixtures to help make the lights seem more real...like it's coming from somewhere.

That is a cool idea... I'm actually rather inspired by these lights, as my previous attempts were downright embarrassing. Also Moosedog pointed me at a render he made using one of my XD exports which followed that line of thinking. If I can get a really realistic indoor environment it would give a sense of scale and I can make a sort of gallery / museum to put them in...

Nick

MooseDog
08-19-2008, 03:59 PM
speak of the devil :D

here's my effort. rad settings are not un-ordinary, with 9.5 though i took advantage of the 3rd party lights already available and added an exit protal light. 3 ies lights along the walls, a surface from the newly arisen presetcentral nad presto! lengthy render! (minor cc with ps to finish things off).

starbase1
08-19-2008, 04:12 PM
speak of the devil :D

here's my effort. rad settings are not un-ordinary, with 9.5 though i took advantage of the 3rd party lights already available and added an exit protal light. 3 ies lights along the walls, a surface from the newly arisen presetcentral nad presto! lengthy render! (minor cc with ps to finish things off).

Neat! How did you cope with the IES brightness? or did it just come in at a useable strength for you? I found that part very messy...

zapper1998
08-19-2008, 04:37 PM
Very interesting Scene thanks for the tester scene..

Here is my render...

with the changes:

changed resolution to 50%
and AS to 0.05
and Oversample to 0.05


61984


Michael

MooseDog
08-19-2008, 09:51 PM
Neat! How did you cope with the IES brightness? or did it just come in at a useable strength for you? I found that part very messy...

just lucky i think. didn't have to mess with it hardly at all.

i'm going to take a liberty, hope it's alright by matt, who shared a tutorial on tweaking ies lights a while back. attached zip file.

starbase1
08-20-2008, 01:54 PM
And a bit of green glass with the IES light.

zapper1998
08-20-2008, 02:36 PM
And a bit of green glass with the IES light.

Ok, what did You change in the scene ????

starbase1
08-20-2008, 04:43 PM
Ok, what did You change in the scene ????

:D

Well...

Took a look at the exception radiosity guide, and tweaked some settings for lighting.
Changed the surface.
Dropped the overall lighting intensity, and increased the strength of global illumination a bit...

Nothing major!
I just seem to be in a productive zone where tweaks work!

I can upload the new scene if anyone is interested?