3D Sphere in Perspective
3mo
Dipede Doodle
Hey folks!
I am recently trying to learn how to draw a sphere in 3D and perspective.
So I tried to draw a 3D Sphere using all 3 Axis (hope it will be shown in the image). Are the contour lines correct?
If so where does this point to (I have added an arrow where I guess it is pointing to and why does my brain think this is wrong - it should be left down tilted to left).
The next thing I don't understand is perspective. So this is a front view representation of sphere. But when a sphere is out of sight than distortion comes into play and a circle becomes an oval is this also correct?
And final question there is basically no two or three point perspective representation of a sphere since you can't see around edges is this also correct (I think this is where 3D is used).
Sorry for these many questions but I am confused hope you could follow and help me out solving this puzzle.
Thank you for your time and have a good one!
👉 This points out what confused me:
You need to understand how the ellipse on each axis is wrapping around the foreshortening of the sphere.
👉 This is the answer I was looking for:
You also need to understand that each ellipse is really a circle.
With a sphere, all points on its surface are equidistant from its center.
👉 My final thoughts:
I was technically correct with the assumption when a sphere is out of sight (view point) it will be disorted. However this effect is not realy noticable so we can ignore it. The ellipses of a sphere are circles even with
disortion.
👉 A little side hustle I had was to use the correct terms for 3D objects. Something like:
square = cube
rectangle = quader
triangle = pyramid
circle = sphere (well messed up with that one - it's a cylinder)
sphere = sphere
and so on. I mean you did that in primary school like me but now I have to do it in two languages I am not a pro in (english & drawing - my english is way better than my drawing). And I also was sleeping on geometry, so just for clarification.
🤌🫵🙏
Stupid 2D circles - they think they are special! Turning into spheres, cylinders, cones - cant decide what object they are represanting. That is too much for my mind 🤯
I think you're confusing a sphere with a circle.With a sphere, all points on its surface are equidistant from its center. The contour you drew are correct, but they mainly show the 3-dimensional quality if the sphere. The only perspective quality of a sphere is that it looks smaller as the distance increases. A silhouette will always be a circle regardless of its orientation or position. It will never be an oval. If the object you are trying to draw is a circle or disk (say a coin or an old-time record), its orientation is important. If you move around a disk, you can get a silhouette correctly represented by your middle drawing. I hope this helps alleviate your confussion.
Actually if you're following strict linear perspective then the silhouette of spheres *will* become ovals as they move away from the center of vision. But, in real life we never look at spheres this way, so it's best to just keep the silhouettes as circles.
The cube is your friend here. Figure out how to draw a cube in perspective, then cut a square in the center of each axis. Then inscribe an ellipse on each square.
Real life is also your friend. Find a sphere. It's best if you can find a clear plastic sphere, but if not any sphere will do. Draw the axes on it. Then draw from life. You need to understand how the ellipse on each axis is wrapping around the foreshortening of the sphere. You also need to understand that each ellipse is really a circle. It's hard to get that understanding if everything you're doing is always 2D.
This is confusing stuff. Give yourself some time to wrap your head around it.
Don’t worry about the mistake. Everyone makes them. Some of mine are embarrassing enough, that I’ll take them to the grave. Because coins and disks have some thickness, they are technically cylinders. I chose them as examples, because they are thin enough to represent circles.
He most be thinking - Did this idiot ever looked to the sky? Does the sun or moon look like an oval you stupid?
