[chalker]

Hi all,
I have some trouble with making a perspective treasure chest.
The point is that I made the bottom, but I can't seem to make the
lid half open.
Everytime I draw a chest by hand, it looks better when drawing with vanishing points.
Still, maybe I am doing something wrong..


The lid looks perspective way off..
Can someone tell me what is wrong with this picture ?
_________________
-http://www.rosss.dds.nl-

[soogarrush]

the sloped lid is supposed to goto "auxiliary vanishing points" on a vertical line perpendicular to the horizon line, thats why it looks off.

so total you will have 4 vanishing point, but i couldnt find anything about it on google (sorry). its a pain doing them, i barely understand it..

[saturnfive]

The main problem you have is that the two lines on the left hand side of your lid converge to a Vanishing Point below the lid, this should really be some way above the lid (VP1 on my drawing)



I'm afraid I don't know a method to calculate these 'auxialliary' VP's, I'm lazy, so I just eyeball them

Also you've placed the eye level just above the hinges. This suggests that either the chest is raised on a table or something, or it's very big (the viwer's eye is below the lid edge!. I've sketched it looking down.

Note, the I've drawn the sides of the chest vertical, but they should also have a VP a long way below the chest. I've still got it a bit wonky there, but it'll give you an idea. Hope this helps a bit.
_________________
Saturnfive Design

[Ian Jones]

Saturnfive almost had it...

The auxillary vanishing points can be found by drawing as Soogarush said a vertical line, perpendicular to the horizon line. The thing that wasn't mentioned however is that this vertical line commonly known as a 'vanishing trace' should be drawn intersecting the existing vanishing point. At the moment saturfive's example pic shows the lid kind of twisted to the left a little. The 'vanishing trace' should be drawn intersecting his 'vp3'. Imagine if the lid were closed and you should begin to realise how this works.

[nailpipe]

i use 3dsmax for these kind of things . but i guess not many people can really afford to have it and use it regularly eh?

[Ian Jones]

Nailpipe... yeah 3D programs are pretty useful (the pro's use them for very complex drawing scenes occaisionally), but its always good to actually understand what you are doing. Besides, next time you go to the city and want to draw a perspective drawing of the buildings... try taking 3dsmax with you... difficult eh?

[nailpipe]

yes.

[spooge demon]

It it easier to keep it in your head if you think about it like this.

It's all about that imaginary plane you think of as the ground, but it can really be anywhere.

[chalker]

thnx for all that info

Saturnfive's picture does look a lot better then mine,
but when I try to replicate it with the auxiliary vanishing points on a line perpendicular to the horizon line, it doesn't seem to be right.

vp1 and vp2 still look better to the left of the picture then on a line perpendicular to vp3

I did indeed replicate it in 3d , but still couldn't figure out how to draw the treasure chest. I was hoping to derive the vp from the 3d picture.. no luck .

Spooge : I don't understand why you rotated the picture ?

I'm still wondering where to put vp vp1 vp2,
do you do it by eyeballing, or can it be measured up..
_________________
-http://www.rosss.dds.nl-

[Ian Jones]

Spooge rotated the pic to show you that the auxilliary vanishing points are exactly the same concept as the usual ones. Note that the shapes are now on an angle, much like the lid of your treasure chest is.

Show us your updated drawing and we can see the changes you mentioned.