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How to light a house....
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
How to light a house.... // Work in Progress
Post by memevertical // Jun 28, 2006, 5:52am
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memevertical
Total Posts: 20
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Hi, i just finished a house, but i'm having a hard time to light the entire house on the inside, its supposed to look like daylight, u know, everything bright but not saturated, i was thinking something like image-based light, but, i dont know, any ideas???
Thanks. |
Post by trueBlue // Jun 28, 2006, 6:24am
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trueBlue
Total Posts: 1761
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Here is a link that I found on the CaliArchive. I beleive Parva supplied the link. I have found this to be very great information on lighting. Thanks Parva!
http://www.itchy-animation.co.uk/tutorials/light01.htm (http://www.itchy-animation.co.uk/tutorials/light01.htm) |
Post by memevertical // Jun 28, 2006, 7:10am
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memevertical
Total Posts: 20
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Cool, but, it doesnt mention specific tools from truespace, i understand lots of things said in that article, but the thing is i dont understand quit exactly how does every light tool of truespace works, so, if someone could just point me in the right direction mentioning what tool could i use, it would be great.
And thanks for the link man, it was really really cool....saved it already :) |
Post by Steinie // Jun 28, 2006, 8:07am
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Steinie
Total Posts: 3667
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Can you add this link to my thread? It is a great site and worth the submission.
http://forums1.caligari.com/truespace/showthread.php?t=889 |
Post by Délé // Jun 28, 2006, 8:23am
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Délé
Total Posts: 1374
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Hans Zijffers (a.k.a. buzz) had some really nice "Painting with light" threads in the old forums.
Painting with light (http://forums.caligari.com/discus/messages/1583/16475.html?)
Painting with light 2 (http://forums.caligari.com/discus/messages/1583/16511.html?)
Painting with light 3 (http://forums.caligari.com/discus/messages/1583/16751.html?)
Painting with light 4 (http://forums.caligari.com/discus/messages/1583/17343.html?)
Painting with light 5 (http://forums.caligari.com/discus/messages/1583/17745.html?)
What version of TS do you have? If you have TS7 you might consider purchasing the HDRI and Vray courses. They are full of useful info. |
Post by memevertical // Jun 28, 2006, 9:15am
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memevertical
Total Posts: 20
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i have 6.5 |
Post by frank // Jun 28, 2006, 10:28am
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frank
Total Posts: 709
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memevertical,
What you are trying to accomplish is simulating bouncing light, which is automatically done in GI simulations but in your case (using 6.5) will require the use of many lights of varying intensities and colors.
I would suggest those links Délé posted. Hans/Buzz got good results using this method, and with an older version of trueSpace. (I think it was 4.3, but I could be wrong.)
Bottom line: It can be done without VRay, but it will take a bit of thought and work. |
Post by W!ZARD // Jun 29, 2006, 10:17pm
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W!ZARD
Total Posts: 2603
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FWIW I usually use LOTS of lights (with tS6.6 and earlier). IBL's are great for getting the colour right then start adding more lights of various kinds. As a very approximate rule of thumb I find that getting the lights right takes at least as long as the modelling |
Post by memevertical // Jul 1, 2006, 6:20am
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memevertical
Total Posts: 20
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well thanks for everything, the "lots of lights" metod really worked for me, but now there is one problem.....render time......i have 2gb ram and p4 procesor. each frame takes 45 minutes, and if i disable raytracing it takes 30 min.....what cn i do? because i have to make a 5 min video out of this.....thanks |
Post by brianalldridge // Jul 1, 2006, 6:27am
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brianalldridge
Total Posts: 397
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well thanks for everything, the "lots of lights" metod really worked for me, but now there is one problem.....render time......i have 2gb ram and p4 procesor. each frame takes 45 minutes, and if i disable raytracing it takes 30 min.....what cn i do? because i have to make a 5 min video out of this.....thanks
Check out stan's glas bottles thread, long renders are a part of CG that can't be avoided without cutting down quality.:) |
Post by memevertical // Jul 1, 2006, 3:33pm
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memevertical
Total Posts: 20
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Well, here's the thing, i know that wanting a faster render means sacrificing some quality, but, i cant find a balance there, because if i take out Raycast, Shadows and Adaptive-line, the render takes almost the same time, but if i take also TEXTURES (which is crazy) then the lights are to bright, so, i just want a nice render. Ok, maybe no reflections or fancy light effects, but something nice.
Here's a screenshot of the kitchen/dinner and another one of outside the house.
thanks for the advice. |
Post by rj0 // Jul 1, 2006, 9:02pm
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rj0
Total Posts: 167
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Pretty nice distribution of lighting. Definitely getting there. One particularly noticable thing though is that it looks like far too many of your lights have shadow casting turned on, causing lots of strange shadows. Usually you want your primary light to be the only shadow-casting light, with the rest just acting as fill lights. Something to consider (might even reduce your rendering times slightly). Keep up the nice work!
rj |
Post by hemulin // Jul 1, 2006, 11:54pm
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hemulin
Total Posts: 1058
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well thanks for everything, the "lots of lights" metod really worked for me, but now there is one problem.....render time......i have 2gb ram and p4 procesor. each frame takes 45 minutes, and if i disable raytracing it takes 30 min.....what cn i do? because i have to make a 5 min video out of this.....thanks
You could reduce the resolution. Remember that standard TV (if that's your preffered viewing) is significantly lower that your average computer res.
Great house btw |
Post by W!ZARD // Jul 2, 2006, 1:54am
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W!ZARD
Total Posts: 2603
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rj0 is onto it. As a (very) rough rule of thumb I have shadow casting on only a few of the lights - just enough to provide the desired shadow effect (which will obviously vary considerably from scene to scene.
So far it's my experience that most scenes are a trade off between the desired quality and the render times. The best results for me anyway, come after a considerable amount of render/tweak/render/tweak/render.
At the end of the day there are no right ways or wrong ways to make a good 3D artwork - there's just what works for you.
HTH |
Post by memevertical // Jul 2, 2006, 3:28am
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memevertical
Total Posts: 20
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Well, the point about not using cast shadow for all lights makes LOTS of sence, i'll do that, thanks ;)
About the resolution, i'm rendering to 720x486 NTSC, so i cant really go below that, but i balive the shadow thing will reduce my render time.
About things looking to far away, well, here goes a new question, i bealive i did my whole modeling not to big, so when i use a camera things where right in my face.......so i rezised my camera only in some coordentates causing that effect, but, how could i just make my whole scene bigger so that i can use a standar camera inside of it?
Thanks guys.... |
Post by TomG // Jul 3, 2006, 5:07am
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TomG
Total Posts: 3397
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You can select all objects to make the scene bigger - do a top view, zoom out to see all the objects, use the rectangle click and drag to select them all, and then scale them up (don't need to glue to scale, if you don't want to change the scene hierarchy, just scale once all selected).
For cutting down on render times, it is always a tricky question. Less shadows may indeed be good. Mapped shadows may be an alternative you could try - it would soften the shadows too, and may speed render time.
Using Radiosity might help - the radiosity solution takes a lot of calculating, but it can be done once, and then used in every render, so that (depending on settings) you can avoid having the shadows recalculated for each frame so that each frame could go faster.
Turning off reflections where they are not essential can also help - although things like the chairs maybe should have reflections, if you really are having time trouble, then it could be an essential step.
Finally, you could use distributed rendering if you have more than one PC, doesn't reduce the time per frame, but sharing the workload will get all the frames done more quickly.
HTH!
Tom |
Post by memevertical // Jul 3, 2006, 4:41pm
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memevertical
Total Posts: 20
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Ok, thanks for the tip about selecting everything and scaling it.
I dont really know what mapped shadows are.
I dont know how to calculate Radiosity and use it on all frames ahead.
Thanks for the help (you can tell i'm a rookie, huh?) :) |
Post by TomG // Jul 5, 2006, 4:05am
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TomG
Total Posts: 3397
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Mapped shadows are easy enough - right click on the icon that toggles shadows on and off in the light properties dialog, and it opens up the shadow properties, allowing you to pick Ray or Map. When you pick Map, the other settings there like Map Size and Quality come into play - best thing there is to read the manual about each of the settings, and then experiment.
For Radiosity, the best thing is to read the manual, since it is quite different from "regular" lighting and has quite a few options that can affect the quality, and can take a long time to calculate. Doing a "Draw Objects As Radosity" will trigger the calculations, found under the flyout for Draw As Solid, Draw as Wireframe, etc. A right click on that will expose the parameters / options. Given that it is a tricky subject, and a whole subject rather than a simple tool, reading the manual and starting with simple scenes before trying to apply it to the scene you are working on is recommended :)
HTH!
Tom |
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