CGTalk - Tire Modeling Exercise

creart

12-13-2002, 10:08 PM

OK,

not bad, how did you go about it? Did you model one segment and rotated that lots of times as dupes or what - some more info please...

Peoples

12-13-2002, 10:12 PM

Yeah - that's pretty much it - check out www.suurland.com - the beetle section has some tips on the tire modeling. Here's one more:

kiwi

12-13-2002, 10:41 PM

Nice work :thumbsup:

Are the tires floating just a little bit above the floor....or is it the shadows :hmm:

Stu.

ThirdEye

12-14-2002, 01:02 AM

Really nice work peoples! :thumbsup:

ps a general consideration: GI is not a must, if you can't wait long times use normal lighting, it's as good as GI.

AdamT

12-14-2002, 02:19 AM

I really like this method of tire creation I came up with. Question: how do you go from the little tire section to the finished tire--

http://members.directvinternet.com/amtberg/Q.jpg

Answer: use the Function-->Duplicate command to create the long section, connect the sections, optimize, and use a bend deformer.

http://members.directvinternet.com/amtberg/A.jpg

AdamT

12-14-2002, 02:31 AM

In situ:

http://members.directvinternet.com/amtberg/Mini_Wheels_R.jpg

Peoples

12-14-2002, 07:28 AM

Nice one! I used the Wrap deformer with cylindrical wrapping - but seems it works just as fine with the bend..What comes to my renders - I tried the enhanced HDRI faking with the help of sadie's tutorial, Its odd that there should be better shadows with that route but my tires don't have shadows at all....weird..I know GI isn't a must - I just haven't put my head into studying realistic lighting techniques without GI yet - it's pretty easy to get some nice results with GI after all (....not talking about my tire pics...heh..)

Adam - speaking of GI - can we see your fabulous mini rendered with hdri someday?:drool: :p

KINGOFPAIN

12-14-2002, 08:19 AM

dang you guys are good.:thumbsup: :thumbsup:

AdamT

12-14-2002, 03:12 PM

Thanks Peoples! I'm working on a scene to put the car in and finally be done with it.

Peoples

12-14-2002, 06:10 PM

I lowered the sideprofile for a more sporty wheel - and played around with dirtyNuz...

ThirdEye

12-14-2002, 06:27 PM

Why using dirtynuts for a clean model? And what about those splotches? Apart from that it looks great

AdamT

12-14-2002, 06:53 PM

I like the lower profile, but I'd pull the center hub of the wheel down some. It looks to be higher than the tire, which would never happen.

kiwi

12-14-2002, 10:13 PM

The tires dont have enough side wall/case now to look realistic as the tread is to far over the sides of the tire.If you look at a real tire you will see they pretty much always have quite a meaty casing that the tread is then put on top of.

Actually the top tires could do with more casing as well.

Stu.

knight42

12-16-2002, 08:09 PM

After pinching this idea for doing tyres, I found it easier to use Instance objects for the tread sections. That way, when I, for example, make a complete pig's ear of the tread pattern, only one section needs to be adjusted.

J

AdamT

12-16-2002, 08:47 PM

Looks real good! The cool thing about this method (using instances, as you point out), is that you can easily create a bunch of different designs just by editing a small section.

kiwi

12-16-2002, 09:07 PM

Excellent idea...

Is that a Landrover wheel by any chance? :shrug:

Stu.

Peoples

12-16-2002, 09:21 PM

Nice!! Excellent textures - is that a photo or did you paint that? Looks very realistic - how did you make the bolts look so dirty?

Peoples

12-17-2002, 08:25 AM

One more - rendered with R8 demo, GI,DoF,Glow - and I won't tell you the rendertime cause you'd kick me out of here for waiting that long..:rolleyes:
I started to model an Audi A2 but that's going to be a looong project. Happy holidays!

ThirdEye

12-17-2002, 10:16 AM

Add the writings on the sides and it will be perfect :thumbsup:

knight42

12-17-2002, 11:09 AM

Kiwi:
Yep, that wheel's off the ongoing Land Rover model. I redid the tyre from scratch after reading this thread - I originally had a cylinder with bump map for the tread and it looked awful.

It looks better now, with the added bonus I can fit my Lannie with racing slicks, etc. without too much work... :thumbsup:

Peoples: The textures are from a wheal reel, I mean real wheel. That yellow bit which looks like a chalk mark is actually a bit of the bodywork from one of the inspection Land Rovers here at work :) - need to realign the texture map... The bolts/hub have a greasy muck texture with dirtynuts in the alpha channel.

J

Anadin

12-17-2002, 12:20 PM

I feel really stupid - I cannot seem to replicate this with instances - I get each section bending where they are.

Help!

That Adrian Guy

12-17-2002, 02:28 PM

Excellent render Peoples.. out of curiosity, how did you use the glow? It looks good... is it only on the floor? Or does everything glow to a certain extent?

Peoples

12-17-2002, 03:21 PM

I used pretty much the default settings for the glow, activated the back luminosity and color, intensity was 8%. I haven't really experimented much with the glow - this was just a quick test..

creart

12-17-2002, 04:07 PM

Hi,

first of all, the tyres you,ve been making look better and better!!

the image I've included is by no means meant to look as good as yours, I just wanted to show that I used the part in the front with a FFD to bend it to form the shape of tyre and to bend the tread
The two tyres show 2 FFD settings - the basic part is the same
For the rest it use your instance- and bend techniques...

knight42

12-17-2002, 06:07 PM

Anadin: do you have the type section, instances and Wrap deformer in an null object? The tyre section and all th instances need to be grouped together. In the attached pic, "tyre" is the null object, "tread section is the poly object to be instanced, and "Plane.xx" are the instances.

Anadin

12-17-2002, 06:16 PM

I hadn't done any of that and I was using bend rather than wrap - that may have had something to do with it - lost the thread a bit there :-)

Toope

12-21-2002, 02:22 PM

that's nice, i've been looking for a method to fo 3d tires for some time...
just one question, how many polys you guys have on those wheels? i wonder if it's possible to make lowpoly 3d tires (and still look good) for games? i've done 3d rims for gta3 but with flat tires and texture on them but i've thought about trying 3d tires...

Peoples

12-21-2002, 02:27 PM

I have no idea how to check the polycount in Cinema4D - I've tried to ask it here sometimes but haven't gotten any answers yet.....:rolleyes:

creart

12-21-2002, 03:20 PM

Hey Peoples,

in the objects window under objects you'll find Object- or Scene-information which states the number of Points, Polygons and Memory-usage, if that's what you're looking for....

AdamT

12-21-2002, 03:57 PM

Originally posted by Peoples
I have no idea how to check the polycount in Cinema4D - I've tried to ask it here sometimes but haven't gotten any answers yet.....:rolleyes:

Object Manager-->Objects-->Object Information/Scene Information.

Toope

12-21-2002, 05:49 PM

well i managed to do some 3d tires and they worked out ok but i don't want to show them since i'm so bad at using materials :D
if anyone could give me some tips on rubber materials and lighting i would apperiate it :cool:
i'm not using cinema4d though :hmm:

ThirdEye

12-21-2002, 06:28 PM

Since you haven't posted your images how can we help you with them? :shrug: Pass on Cinema 4D, your materials will be better :scream: :D

Peoples

12-23-2002, 10:53 PM

Thanx guys!!:p

Okay - rendered one with a dome-fake for GI - one rim+tire has 7856 polys if someone is still interested...

http://www.hut.fi/~vhautala/Audirims.jpg

Brent Turbo

12-30-2002, 05:21 AM

Hey Peoples, nice lighting on that last tire pic! Looking good! I'd suggest you put a little bit of reflection on the tires, and a tiny bump map to diffuse it a little, as rubber tends to show soft reflections...

I once made a tire using the same technique, based on the tread of a bridgestone, and with your car's younger sibling as the wheel. You can see what I'm talking about with the reflections...

Oh, and ignore the lack of lugs on the wheel, this is an old version and I'm not on my regular computer. Sorry for the huge image!!:

http://brent.dreamhost.com/tire_wire.jpg

http://brent.dreamhost.com/wheel_number_one.jpg

Keep up the good work, man!:applause: :applause:

Brent

Peoples

12-30-2002, 10:11 AM

Now that looks just amazing!!!:applause: :applause: :applause:
Have to give it a go - thanks for the tip..!

ivo D

01-18-2003, 08:13 AM

uhm my english is just bad i gues.. im using max.. and i cant firure out how you did those realistic tires..

could someone explain it very simple..

you make a part and than duplicate it 60 times and than bend it.. thats what i know..

but how do you modell the tire part.. the grooves and so on.. , using displacement?

knight42

01-18-2003, 01:15 PM

Yes, you've got it. Start with a plane, extrude tread patterns into it, extrude the side edges down into the tyre wall - here's mine.

(sorry for the fuzzy pic - 30,000 bytes ain't much)

ivo D

01-18-2003, 06:40 PM

thanks for the explanation..

just wanted to get it right.. the first time:)

im working on the dodge tomahawk bike now.. its a prototype.. max speed 680km/h :P

its in the wip section..

crits are welcome..

srry for the off-topic

sad

01-18-2003, 07:04 PM

http://www.hello-napalm.com/tuts/tut_tire.html

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