I have searched the forums but can any post a set of pictures or picture to a guideline on how to a build a dome, Mine always come out
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Shape or just completely stupid looking. Any help thanks

Open up MS Paint and make a new picture the size you want your dome to be. Then draw a circle so that it's the size of the image. That's the base of your dome. Zoom way in and you can see the individual pixels, those represent blocks. Plot it out with dirt and see if you like it.

Repeat for each level, subtracting 2 pixels from the size of the image each time you go up a level.

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Open up MS Paint and make a new picture the size you want your dome to be. Then draw a circle so that it's the size of the image. That's the base of your dome. Zoom way in and you can see the individual pixels, those represent blocks. Plot it out with dirt and see if you like it.

Repeat for each level, subtracting 2 pixels from the size of the image each time you go up a level.

That's not a dome, it's a cone.

To make a proper dome you need to take the base circle, cut it in half, and then use that as the plans for making two crossing arches over the top and then fill in the space in between. When filling in a layer, draw a new circle using the outermost blocks on your arches to determine the size of the circle.

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Tis far better to be a witty fool than a foolish wit.

For spheres and circles and domes and such I use a little utility someone developed for Dwarf Fortress. You just have to type in how tall you want it to be in the 'Z-levels' field and use the pull-down menu to navigate between slices. If you mess around with 'X/Y to Z ratio' it will make taller or flatter domes. 1 makes it a perfect sphere.
You can download it here, just run it in a web browser.

You can make a dome by making a large blob, then standing in part of it and deleting everything you can. Fill in the edge with glass or something, and delete the dirt. It isn't perfect, but it is easy.

Yea, I know it's not perfect as you would wind up with a cylindrical bottom for larger circles.

Really what you would want to do is start at the narrow end of each axis and build rings perpendicular to the axis using your arches (and floor circle) as guides for the size of the circle at each step. Though I think that description is probably going to confuse anyone who doesn't already understand what I was talking about.
( we really need a convention here for what smile goes with what expression. The skelly sort of looks like a :/ IMO )

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Tis far better to be a witty fool than a foolish wit.

I made a sphere for a sun, and I plan to make a really huge dome soon.
Thing you need to consider are:
Each layer of the dome must be smaller. And it doesn't just shrink by one block each time.
You must make sure the layers are the same (think of it as a sphere) from any direction (axis).

I used a program called Voxel Section Editor to plan out my sphere.
Basically it's a 3D program but with voxels, which are cubes. So it was perfect to use.
I might make a tutorial for it sometime.

Thanks for the help everyone, Going to try that sphere planning tool (Thanks to TKGP) and have a look into this Voxel Section Editor (Darentei thanks) and then use the other tips in here to try and get my dome to atleast look right.

Edit: That Sphere planner loks like it could be good.

I had this same problem. It's hard to find just the right thing... and it's easy to create a cone if you're not careful. At first, I created an excel spreadsheet to do this, but found it to be lacking in visual aid; it can get pretty confusing looking at a spreadsheet of numbers of the length of each line when you're actually inside the sphere.

Change around the URL parameter to set different size spheres. And it may feel a little clunky; I wrote it for myself, and I never intended on giving it to anyone. It only works if there's exactly one cube in the center; so the actual diameter of the sphere will be an odd number.

Basically, how it works; every time you change the dropdown for the level (z, basically how far you are above or below the center), it considers the table to be a cross section of the sphere at that level, with every cell being a cube. It calculates using the Pythagorean theorem in 3 dimensions... sqrt(x^2+y^2+z^2) to calculate the distance from the origin, and if that's smaller than the radius, it colors it. And if X or Y is divisible by 5, it's red; otherwise black (which makes lines which make it easier to transcribe into the game).

Be careful committing yourself to a very large radius... the surface area of a sphere contains r^2, so you need a lot of glass... but more importantly the area of a sphere contains r^3, so the amount of space you have to excavate (if you build your sphere underground, like i did) increases at an incredible amount.

In total, work inside of the game took me about 20 hours to do.

Excellent work, but it seems your math is a bit off for creating spheres. This tool seems to be better suited for making rounded corners of a 3-dimentional rectangle (like a building with rounded corners).

I say this because the sides are extremely flat. Anyone know how to tweak his math (viewable in page source) to make the sides less flat? In the circles I create in paint, with a radius of 16, the sides are about 5 pixels on the widest edge. On this tool, they're 12.. very flat sides for a sphere.

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Shape or just completely stupid looking. Any help thanks

Repeat for each level, subtracting 2 pixels from the size of the image each time you go up a level.

That's not a dome, it's a cone.

To make a proper dome you need to take the base circle, cut it in half, and then use that as the plans for making two crossing arches over the top and then fill in the space in between. When filling in a layer, draw a new circle using the outermost blocks on your arches to determine the size of the circle.

You can download it here, just run it in a web browser.

Ceci n'est pas une signature.

I am the milkman, my milk is delicious!

That makes a cone.

Contains Pachebel's Canon made with noteblocks, a working Rubik's cube made with pistons, and the ultimate TNT cannon.

Yea, I know it's not perfect as you would wind up with a cylindrical bottom for larger circles.

Really what you would want to do is start at the narrow end of each axis and build rings perpendicular to the axis using your arches (and floor circle) as guides for the size of the circle at each step. Though I think that description is probably going to confuse anyone who doesn't already understand what I was talking about.

( we really need a convention here for what smile goes with what expression. The skelly sort of looks like a :/ IMO )

Thing you need to consider are:

Each layer of the dome must be smaller. And it doesn't just shrink by one block each time.

You must make sure the layers are the same (think of it as a sphere) from any direction (axis).

I used a program called Voxel Section Editor to plan out my sphere.

Basically it's a 3D program but with voxels, which are cubes. So it was perfect to use.

I might make a tutorial for it sometime.

Edit: That Sphere planner loks like it could be good.

I eventually settled on creating this:

http://philihp.com/arc_reactor.php?radius=20

Change around the URL parameter to set different size spheres. And it may feel a little clunky; I wrote it for myself, and I never intended on giving it to anyone. It only works if there's exactly one cube in the center; so the actual diameter of the sphere will be an odd number.

Basically, how it works; every time you change the dropdown for the level (z, basically how far you are above or below the center), it considers the table to be a cross section of the sphere at that level, with every cell being a cube. It calculates using the Pythagorean theorem in 3 dimensions... sqrt(x^2+y^2+z^2) to calculate the distance from the origin, and if that's smaller than the radius, it colors it. And if X or Y is divisible by 5, it's red; otherwise black (which makes lines which make it easier to transcribe into the game).

Be careful committing yourself to a very large radius... the surface area of a sphere contains r^2, so you need a lot of glass... but more importantly the area of a sphere contains r^3, so the amount of space you have to excavate (if you build your sphere underground, like i did) increases at an incredible amount.

In total, work inside of the game took me about 20 hours to do.

This is really cool. I am going to try this out. Make something small first like 7 or 8 radius to see how I do and go from there.

Thank you for sharing this.

CombatPhil, I hadn't ever registered on the minecraft forums until you posted this. You made me register with your awesome.

Imma go use it now. Peace.

Excellent work, but it seems your math is a bit off for creating spheres. This tool seems to be better suited for making rounded corners of a 3-dimentional rectangle (like a building with rounded corners).

I say this because the sides are extremely flat. Anyone know how to tweak his math (viewable in page source) to make the sides less flat? In the circles I create in paint, with a radius of 16, the sides are about 5 pixels on the widest edge. On this tool, they're 12.. very flat sides for a sphere.

This.

This is the best option for making domes and spheres. IMO