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View Full Version : Leaving "tracks" on "terrain"

ryguy
10-23-2002, 06:31 PM
I'm trying to find the best way to do this:

I have a vehicle and a high polygon terrian (it's actually a DEM file so I really need to use it). I need my vehicle to leave tire tracks on my terrain. Any suggestions?

I thought this might be a Paint FX situation at first, however I do have to account that I have a high poly terrain.

If anyone knows of a better and more effient way, please let me know :)

~Ryan
audim
10-23-2002, 06:57 PM
I would do it with compositing.
One version without the tracks, and one with the complete track.
And then composite with masks.

Maybe not the best solution, but it works.
Slade
10-24-2002, 04:52 AM
Maybe a displacement map revealed by a ramp? This would be an "in Maya" solution, but probably more problematic than just comping it.
gmask
10-24-2002, 05:02 AM
I think there is a tutorial on the www.aliaswavefront.com site that shows how to make the ground a softbody surface so that it deforms as your character crosses over it.
ACFred
10-24-2002, 08:10 AM
I agree with gmask. Softbodies is the way to go. Obdviously, though, you don't want to make all of the terrain a softbody since I doubt if you'll be driving all over it. Your best bet is to chop out the chunk that will be driven over and make it the softbody.

In fact.....*digging around in my files*.....I have a mediocre example I did in school that should illustrate the point.

You can see the playblast here:
http://www.community3d.com/stuff/snowtest.avi

Here is a render from the shot:
http://www.community3d.com/stuff/snowball.jpg

I was messing around with creating a snow shader. I obviously never got it to look quite right.....but I digress.

Ask if you have any questions on how to set it up.


Good luck!

Alec
DrAdamDinosaur
10-24-2002, 08:49 AM
Wow, I was just on my way here to post this exact question, only in relation to foot prints. Will have to have a look on the A|W site then.
Six60Sicks
10-25-2002, 10:58 AM
wind-fan setting, attached to the soles of the feet that blow towards the soft body ground plane works great for me. although i would love to hear tips on making say a muddy ground bunch up creating a lip around the foot. if that makes sense.
PB
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