Digital Art Zone

 
     
Problems modelling a stone with primitives
Posted: 07 October 2012 12:42 PM   [ Ignore ]
Member
Rank
Total Posts:  155
Joined  2011-10-27

OK - i’ve spent a day trying to model a stone with primitives.
With failures.

I’ve had crashes trying to add tessalations and crashes trying to add points - getting fed up with crashes….

However… I’ve created an illustration below.

I’m trying to model the stone with the arrow pointint go it…
The cube is OK but too sharp.
I added smoothing - level 1 but the edges are too round and I cannot straighten them out to make the suface more rugged. highlighted by the red marks.
I tried another primitive but when I add tessalations to it to divide it up the program crashes.

So please someone can you explain how I can model a stone likt the real thing.

Thanks

Image Attachments
Image1.jpg
Profile
 
 
Posted: 07 October 2012 02:14 PM   [ Ignore ]   [ # 1 ]
Power Member
Avatar
RankRankRank
Total Posts:  1537
Joined  2008-01-01

Something like this?

Insert sphere, select one of the geodesic options, bring the number of points down quite low - in this case I made it four.  Validate.

Select faces or verts, with soft selection active and push/pull until you get the shape you want.  For jagged, don’t smooth.  for smooth, select level 1 and once you are happy with the shape, collapse DG by hitting the lightning bolt.

If you intend making the entire wall from individual rocks, you are going to end up with a seriously high poly count - better to model the the general shape of the wall and use a texture with bump or normal mapping to get the detail.

Image Attachments
rock.jpg
Profile
 
 
Posted: 07 October 2012 02:52 PM   [ Ignore ]   [ # 2 ]
Addict
Avatar
RankRankRankRank
Total Posts:  4524
Joined  2007-09-13
Roygee - 07 October 2012 02:14 PM

If you intend making the entire wall from individual rocks, you are going to end up with a seriously high poly count - better to model the the general shape of the wall and use a texture with bump or normal mapping to get the detail.

And that’s leaving out lining them all up so they are touching without leaving odd looking gaps, not sticking out at odd angles and not intersecting each other (can cause some very odd render problems)  and probably a rather long list of other problems.

 Signature 

1432 old posts

My ShareCG gallery.

Just because something costs a lot, doesn’t mean it’s the best…

It just means it’s expensive.

Profile
 
 
Posted: 10 October 2012 01:27 PM   [ Ignore ]   [ # 3 ]
Member
Avatar
Rank
Total Posts:  209
Joined  2003-10-09

more fun to use the sculpting tools when making rocks. wink

 Signature 

Renderosity. http://www.renderosity.com/mod/bcs/index.php?vendor=29771

Rendo Freebies. http://www.renderosity.com/mod/freestuff/index.php?username=ghostman

RDNA http://www.runtimedna.com/Ghostman/

Profile
 
 
Posted: 10 October 2012 01:48 PM   [ Ignore ]   [ # 4 ]
Power Member
Avatar
RankRankRank
Total Posts:  1537
Joined  2008-01-01

Hi Ghostman - long time:)

Yes indeed - the OP being a beginner, I thought to keep it simple.

Cheers

Profile