Hi I have to light a set that will have a physio room, a brace shop a corridor and a lobby. Kind of hospital-ish, with the brace shop being darker but with some spots (I can do that, as well as the daylight through the windows in the lobby) but how do you get a "flourescent" (please excuse spelling if it's wrong) look?

I will also use this kind of lighting in a junior high school corridor.

Thank you,

Seana

if you're actually going to use radiosity, how about bouncing a light off a rectangle the shape of your flourescent light fixture? You could use a mask on the light to keep it from hitting anything else.

Ok. Having just done a bunch of stuff involving florescent lights i think i have a pretty good understanding of how to get a basic set up.



dont do this. i ran into major problems with this type of light bouncing. The rays get to compact and result in realy bizzare artifacts and small super light spots everywhere in the scene.

The best way to do it is to create a color and ambience map for the tubes, make the casing of the florescent light have ambience, and have several keligs pointing strait down from the light. I would also direct you to an earlier topic i made http://www.hash.com/forums/index.php?showtopic=17820. I ended up going with 4 keligs, none of which pointed up, after all was said and done, but let me know what you're looking for in florecences.

Thanks very much both. A bounce reflector would have been my first thought if I were setting up lighting for stop motion, but thanks for the cavaet about artifacting.
Dan -- I've read through and bookmarked the other thread, and I'll probably print it out with pictures so I don't have to flip (Santa needs to bring me a second monitor, but I think a lump of coal is more likely)

Too bad your dog didn't have any ideas...I think my cat would help if I kept her in tuna fish and catnip mice to the extent she thinks she deserves, then again... maybe not.

How long did your corridor take to render?

Seana

Hi Seana :

Im doing a lot of studies about lightnin, I finished my fake florescent light project and rendered it in stereo mode.. this test isnt to show model skill but to test shadows ...NO RADIOSITY ...2 lights to compound GI and 1 light to fake florescent light, each frame ( 480x360 ) was rendered in 8 min, using 100 passes ... please follow this link to image http://www.hash.com/forums/index.php?showt...12&#entry142512

Wow. so many ways to do it... so, here's the question from the not-a-rocket-scientist: does it need to be rendered in stereo? I haven't explored that yet, just read about how to do it. Do I need to?

S.

Hi Seana ... you DONT need to render it in stereo mode ... i just rendered it in stereo to "feel" the atmosphere ....

okay, well I might give the stereo render a miss then. That kind of lighting actually makes me feel a little ill if it's really severe in real life, so I'm not sure what a realistic atmosphere would do. I just need it for these institutional settings.

It would be fun I guess for people who use tanning salons to render themselves out a tanning bed--different light, yes, but there's realism for you. (joking)

thanks all

S.

Sorry i didn't get here sooner. I was playing Battle Field 2 for the last 24 hours strait... i love me some Mountain Dew... 876% caffeine!! Anywho... I would recommend that you don't use bulb lights for radiosity. Normally if you have bulbs that are too close to surfaces with complex geometry, rays will get trapped, and like before, when they finally escape they'll be super bright. Only have kliegs pointing down... i would say at least 4 and make the florescent housing and the tubes have a high ambience intensity.

Xtas. Very nice scene to test lighting; however, 100 passes is absolutely unnessesary. You just have to make sure that you lights have a ray cast of 2 and 100% darkness shadows with 16 passes (4x4). Now your light rig seems very odd. It appears that you florescent tube is only producing light from 3 points, the middle/left/and right, and it creates contrasting separate shadow lines inside the combination of the shadows. I would recommend that if you don't want to use radiosity, you should use upwards of 10 lights to span the length of the tube evenly so you don't get harsh separated shadow lines.

If you wanted to created the realist looking florescent light, without the use of radiosity, you would want to take however many lights you wanted to use for the length, and make 8 or 4 rows that would go all around the light. But... unless you want to take that long to set up just one florescent tube i'd just recommend strategically placing about 20 lights all around the tube to prevent combinded shadow constrast lines.

BTW: the industrial hallway stereo i made took 13 hours to render... lol... primarily because of the settings i was using (soft shadows, soft reflections, soften passes) and the fact that i had photon samples up to 500 and one million ray casts. But, if i turned those down it would have possibly taken 2 hours or so.

PLEASE NOTE: radiosity in rendering motion picture is very resource intensive. Unless you own a Cray (http://www.cray.com/) it is not recommended that you render any sort of animation with high quality radiosity, because of the time it would take to produce the images.

Yipee! how soon can I get one make that three-from Best Buy? Oh yeah, and a dongle version of A:M from Hash!

Can you $ay "ouch"? (If not, I'll bet your budget could after three of tho$e boxe$ and the HDD$ to $upport all the output...)

Seriously, Xtaz, I like your rendering of the dalmation... and Dans' concrete hallway was fantastic.

I'm trying to get the flourescent look on my exhaust fan, too.. right now, it's only about 20 minutes per render... So, I know I've got a ways to go for the realism I'm looking for.

DanCBradbury



You are considering that I just used a light in a fixed place. what I did was to create an 100 frames action, with the light traveling a straight line (extension of the florescent light). Made that I imported it for CHO and I set the action was made in only one frame. Of this it sorts things out I simulate 100 lights in 1 frame, but in a much faster way.

You must tell me how to do the many frame compression into 1 frame. If that is even a sentence.

Okay, there's also another way to do the florescent lights. You can always go on the cheap like in video games and just put 1 light for each bulb. Also, changed the color of the light to be a little more blue than white. Remember, this is for quick animations, not something that's going to look spectacular.

Until we can get a breakdown of colors casted by a light through the light spectrum, we can only make it blue instead of only being red, blue, and green (Totally skips over yellow and violet).

Lets Go :
-Create a model whit 1 light
-Create a new model action ..set new position for the light in frame #100
-in Cho, import model and action
-set action properties to :
lenght = 1
repeat = # frames



- set motion blur =100%

To use this procedure, the parameters for motion blur should be related to the lenght of the action .
lenght --- motion blur(%)
1 100
.9 90
.8 80
.7 70
.6 60
.5 50
.4 40
.3 30
.2 20
.1 10

you will create an unique frame, composed by the created action

Wow... very interesting. I would have never thought to do that; however, you still get quite a few problems assassiated with your renders.

Here's a render i did with the same set up you made except i have 10 lights and they're in their respected spots all on one frame. This is not a stereo. The left, without radiosity, rendered in 2:22, and the right, with radiosity, rendered in 11:46. Because i used bulb lights however and had areas in the set that attained perfect white for a brightness it resulted in major artifacting. But still, it's not that much longer to get the desired look. It just depends on how long you want to spend rendering and how real you want it to look.

Maybe not... but an interesting effect if you treat it like one!

I'm realy learning alot here.... I have a call for a flourescent radiosity render and this is showing me alot...

my thanks to all

Hi :

I initiated a new thread, showing how to set properly this MUFOOF