View Full Version : Obtain A Photorealitic Render
Analog-42 11-08-2004, 05:34 PM Ok guys im sorry if im bothering. I need alittle help.
I started this render this morning and ive been trying to get
it to look realisitc. ive tried many different lighting rigs and i
cant seem to make it look right. Im not to good with tweeking
the materials eather ive been trying all morning lol. Any tips on
how to get it to look more real.
http://img.photobucket.com/albums/v508/Analog-42/testcgtalk.jpg
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JamesMK
11-08-2004, 05:43 PM
The basic suggestions:
1. Never use specularity when trying to get photoreal. Switch it off in all your materials, then carefully attenuate reflections instead. Put whitecards around your scene to give the objects something to reflect.
2. Use area shadows. Slow as hell, but it will make a huge difference for this particular type of image
3. Tweak your lights. It's rather flat right now. Experiment.
4. Consider rendering with HDRI. This is mainly reflective plastics, and they usually look very good with some HDRI, either for reflection only, or full-blown GI with HDRI
rikke
11-08-2004, 05:50 PM
Hm.. where shall I begin? No seriously, there are some relatively easy things you could do:
-Ad some more reflection/specularity to the pills, to get the shiny plasic effect
-It's an interior scene, so use soft instead of hard shadows. You might also consider to add a few extra soft shadows, but less bright than your main lighting. If you take a look around your own place, you'll see that there are always multiple lightsources illuminating your room (or you must be real stingy ;-)
-The geometry of the bottle is too basic. Grab something out of your medicine case and take a good look at it.
-If you're used to using hdri: use it! If not, there are plenty of tutorials around
good luck!
jddog
11-08-2004, 05:53 PM
1. Never use specularity when trying to get photoreal.
:hmm: with this you mean is better to use reflection...? plastic material can't be more real with specularity... ?
hmm
jdd
JamesMK
11-08-2004, 05:57 PM
:hmm: with this you mean is better to use reflection...? plastic material can't be more real with specularity... ?
Just look at the "highlights" of any plastics around you... look closely. You will see the reflection of a physical lightsource, not a generic specular highlight.
Ric535
11-08-2004, 06:49 PM
how about posting the scene - we can give it a bash and then repost it if we get a good result - then you can study what we did :)
JamesMK
11-08-2004, 06:53 PM
how about posting the scene - we can give it a bash and then repost it if we get a good result - then you can study what we did :)
Now there's an excellent suggestion!
Analog-42
11-08-2004, 07:22 PM
thats what i was orignially going to do but i couldnt find anywhere that would host it... do u guys know here i can
JamesMK
11-08-2004, 07:28 PM
You can mail it to me if you like, I'll host it.
jameskaufeldt(at)gmail(dot)com
soapy
11-08-2004, 07:40 PM
Well I am not too sure about dumping specularity altogether, true; specularity is the faking of reflected highlights. But I think using reflection on very matte surfaces is pretty difficult and speculars render a lot faster. I like speculars for a lot of things. For very shiny things reflection is a must though. Here is a link that covers specular vs reflection pretty well:
http://www.newtek.com/products/lightwave/tutorials/surface/texturing_for_dummies_004/
The link is for lightwave but most all of the info is transferable.
InTheCity
11-08-2004, 08:10 PM
http://www.project1media.com/cl2/pills.jpg
Remember "Photoshop is your friend"
This took just a few minutes.
Kitchen HDR. 1 Light at 30% with softshadow.
Render and go.
Analog-42
11-08-2004, 08:33 PM
wow..sanfran guy thats awsome thats exactly what im trying to do..what did u have u materials set at..reflections or spectacularity..ive been trying all day and u do it in 1 min lol..do u have msn or aim or yahoo messenger lol
phoshidesign
11-08-2004, 08:40 PM
Hey, here is a radiosity example I did a couple years back... Very simular, It's a sky obj with a HDRI (no lights) near default radiosity settings. I used the "beachProbe" hdri img.
http://www.phoshidesign.net/gal_still_pillSpill.html
InTheCity
11-08-2004, 09:08 PM
wow..sanfran guy thats awsome thats exactly what im trying to do..what did u have u materials set at..reflections or spectacularity..ive been trying all day and u do it in 1 min lol..do u have msn or aim or yahoo messenger lolhttp://athens.ict.usc.edu/Probes/kitchen_probe.hdr
and
http://www.project1media.com/cgtalk/pills.zip
Drop the Kitchen_probe.hdr in your texture folder
Render
Ric535
11-08-2004, 10:21 PM
well heres my attempt
http://members.aol.com/rikwatkins/PillsRic.jpg
10 lights,
no radiosity,
bit of colour mapping and glow,
15 seconds render
http://members.aol.com/rikwatkins/PillsRic.zip (enable post effects in render setting)
holle
11-09-2004, 08:03 AM
Hi,
nice thread.
Here my first try:
http://www.schoemann-unna.de/preview/PillsHolle1_pw.jpg
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