[Help Thread] Please help me with this world map 8x8 picture cube!!!

cubemastery321 said:

Welcome — and good work getting this far, the last centers are the fiddly bit on a picture cube.

The key thing is you can't just swap those two pairs directly — a two-piece swap isn't possible, so you need to cycle three center pieces instead.

Try this: hold the cube with one of those centers on top and the other on the front. Turn an inner layer (the layer just in from the face) to bring a yellow piece from the front center up to the top, turn the top once to put that piece where it belongs, then turn the inner layer back and turn the top back. That moves three center pieces in a cycle. Repeat it with a different setup turn on top first if needed, and the last four should fall into place without breaking the centers you've already finished.

Two things that trip people up on a picture cube like this: match the actual map detail, not just the color — a yellow piece can be in the right color center but the wrong spot in the picture — and check the center pieces are the right way round, since the map lines need to line up.

If you try that cycle and a piece still ends up in the wrong center, tell us which colors are where and we can walk through the setup from there.

Click to expand...

cubemastery321 said:

Welcome — and good work getting this far, the last centers are the fiddly bit on a picture cube.

The key thing is you can't just swap those two pairs directly — a two-piece swap isn't possible, so you need to cycle three center pieces instead.

Try this: hold the cube with one of those centers on top and the other on the front. Turn an inner layer (the layer just in from the face) to bring a yellow piece from the front center up to the top, turn the top once to put that piece where it belongs, then turn the inner layer back and turn the top back. That moves three center pieces in a cycle. Repeat it with a different setup turn on top first if needed, and the last four should fall into place without breaking the centers you've already finished.

Two things that trip people up on a picture cube like this: match the actual map detail, not just the color — a yellow piece can be in the right color center but the wrong spot in the picture — and check the center pieces are the right way round, since the map lines need to line up.

If you try that cycle and a piece still ends up in the wrong center, tell us which colors are where and we can walk through the setup from there.

Click to expand...

quan2206 said:

Please help me, i don't know how to pair these four blocks, yellow to yellow, cyan to cyan, I'm have stucked hear for 2 week, this is the last step to make center.

Click to expand...

Jacck said:

I may be wrong but if you want to swap yellow with yellow and blue with blue, then it is impossible.
Explanation 1: if you would disassemble the cube you would see that the two yellow ones are not the same shape, they are mirrowed - and therefore won't fit in the other's place. Or a blindcuber would say: they don't belong to the same oblique-set.
Explanation 2: it is impossible to move one yellow "on" the other with a F-turn.

I don't know how the rest of your cube looks like (are there pictures, too?). The best thing I could get with twizzle was to swap a yellow one with the diaginal blue one (they are built with the same shape and could be moved "on" each other with an F2). But I could only do that by swapping two centers on the white face, too (if there is no picture there, if all centers are white, you won't see that).

To make it more clear the first part is to get four different colored centers on front.

 Twizzle link 

// get 4 different colors on front 
[D, 3F' 4U' 3F]
[L, 4B' 3R 4B]
[R, 4F' 3L' 4F]
3R2 F 4L2 F' 3R2 F 4L2 F'
// diagonal swap on green side downleft to upright and on white side backleft and rightback
[4U' 3B' 4U, F2]
[U', 3B' 4U' 3B]
// diagonal swap on green side upleft to downright and on white side frontleft and leftback
[4U' 3F 4U, F2]
[U', 3F 4U' 3F']

So if you ask me: your problem with the cube must be something else ...

Click to expand...

Jacck said:

(We already know now that you can't switch only two pieces.)
If I'm right, then the piece three places behind the yellow one looks exactly the same as the yellow one itsself (only grey and no picture on them). So we can cycle this one, the red one and the yellow one together:

 Twizzle link 

3F 3D 3F' U 3F 3D' 3F' U'

// written as a commutator
//[3F 3D 3F', U]

You could take the diagonal piece of the yellow, too. Then use an U2 instead of the U and U'.

If the yellow one has a bit of picture, then you could switch yellow and red while switching the 2 pictureless ones in the back (similar like I did in the last post). If you have problems with that, then post it.

Click to expand...