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Joe Smith
Byrne Robotics Member
Joined: 29 August 2004
Location: United States
Posts: 6597
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| Posted: 19 September 2008 at 2:37pm | IP Logged | 1
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 what, other than the ugly design, did I do wrong on this cargo van?
Something seems way off.
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Orlando Teuta Jr
Byrne Robotics Member
Joined: 17 April 2004
Location: United States
Posts: 1043
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| Posted: 19 September 2008 at 2:55pm | IP Logged | 2
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Looks like the proportions are off. The side of the bus should look shorter or the front short be longer. The front of the bus should be on the same horizon line as the side. The top on the front side should also point down not up.
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JT Molloy
Byrne Robotics Member
Joined: 19 February 2008
Posts: 2092
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| Posted: 19 September 2008 at 2:56pm | IP Logged | 3
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The vertical vanishing point is way too close to the horizon. If you're staring at a van and the horizon is in the middle of it, the lines on the sides should'nt be so angular. Try dragging the point down a lot lower. (Also the van itself is a bit thin.) Hope that helps a bit!
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Chris Abel
Byrne Robotics Member
Joined: 01 February 2005
Location: United States
Posts: 603
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| Posted: 19 September 2008 at 2:59pm | IP Logged | 4
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It appears that your vanishing points aren't vanishing to the same
horizon as the should be. The lines angling off to the right don't
actually converge at the same vanishing point either.
I overlaid some lines to your drawing.
The Dark Red ones are the lines that should be going to vanishing points.
The Dark Blue one is the horizon line.
The Light Blue ones are the righ side lines going to the vanishing
point on the horizon line to match the point established by where the
lowest red line crosses the horizon line.
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Andrew Hess
Byrne Robotics Member
Joined: 16 April 2004
Location: United States
Posts: 9842
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| Posted: 19 September 2008 at 3:11pm | IP Logged | 5
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What they said.
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Knut Robert Knutsen
Byrne Robotics Member
Joined: 22 September 2006
Posts: 7374
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| Posted: 19 September 2008 at 3:22pm | IP Logged | 6
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Also, the front wheel does not line up with the back wheel. The way it is now, it looks tilted. Did you use an ellipse guide of the same degree? Hard to tell without printing it out.
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Tom Perkowitz
Byrne Robotics Member
Joined: 08 August 2004
Location: United States
Posts: 123
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| Posted: 19 September 2008 at 3:23pm | IP Logged | 7
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There's also a vanishing point below the vehicle that is screwing things up.
Here it is with that one removed.
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John Byrne
Grumpy Old Guy
Joined: 11 May 2005
Posts: 132241
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| Posted: 19 September 2008 at 4:07pm | IP Logged | 8
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Three point perspectives are tricky. I recommend them, as they add an extra
scoop of realism, but, as your drawing shows, badly handled they subtract
realism, creating fisheye lens effects and the like.
Now, I am sure there are graphs and charts and mathematical formulas that
allow artists to work out where the third point should be, once the first two
are placed -- but I have found the best approach in the long run is trial and
error. Keep running that play until you get it right. And that means thinking
about where each point is, relative to the horizon. This becomes almost a
gut reaction kind of thing, but there is some thought involved. In this case,
seeing where we are, relative to the horizon, indicates that the lower
v.p. should, indeed, be much further down.
Incidentally -- Chris was on the right track, but he missed on important
point. Because we are clearly looking at the roofline head on, that
establishes our horizon, which is therefore tipped.
This more clearly shows that your right hand vanishing point is somewhere
near infinity, since the lines on the front of your van barely converge at all.
So what you're doing here is a two point perspective trying to look like a
three point.
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Brian Miller
Byrne Robotics Member
Joined: 28 July 2004
Location: United States
Posts: 30888
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| Posted: 19 September 2008 at 5:07pm | IP Logged | 9
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So what you're doing here is a two point perspective trying to look like a
three point.
***************
Would the lines running from top to bottom not be the third point?
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John Byrne
Grumpy Old Guy
Joined: 11 May 2005
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| Posted: 19 September 2008 at 6:40pm | IP Logged | 10
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sigh
The lower point would be the third point if the right hand lines had a
point, but since they don't. . . .
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Brian Miller
Byrne Robotics Member
Joined: 28 July 2004
Location: United States
Posts: 30888
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| Posted: 19 September 2008 at 8:30pm | IP Logged | 11
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Just trying to understand what you were talking about. Didn't mean to upset you.
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Joe Smith
Byrne Robotics Member
Joined: 29 August 2004
Location: United States
Posts: 6597
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| Posted: 19 September 2008 at 8:53pm | IP Logged | 12
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I'm going with, just keep running that play, and thanks
all.
I just miscalculated the third point too high.
I'll try again.
I think that by me NOT establishing a horizon line first
hurt me in the end.
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Topic Closed)
