How to cut inside a mesh? (Picture)

mad man

Extreme 3D modelling noob here, been wondering how to do something in Blender. I'm trying to like...make a cut inside the middle of this circle cylinder thing. I want to make it so I can cut straight in the middle and just have the middle of it empty without having to go back and fill in every part and possibly mess up the model. I made a picture below to explain it clearly.

As you see I would like to have this ring shaped object just have the middle empty and have the rest fine. Think of something like a halo.

Adam L. Gray

Weell, basically you want a tube shape. Not sure about blender since I don't use it myself, in max there would even be a premade prim for this sort of shape, but you should learn how to do it either way.

The way I would go about it is as such (assuming I only have extrude and scale)

First extrude the center of your cylinder by 0, then scale it down, that will give you a inner circle which you can now delete.

Then select one of the inner circles in 'edge mode' and extrude one of them down to the other, and weld.

That should have you set until someone who actually knows blender comes along

SkyWay

the way I do it is to have my cylinder, delete the top and bottom faces, add a solidify modifier to it, adjust thickness to your liking and then apply.

Very weird, but it's Blender :P

walkonsky

im not exactly sure if i understood your question right, but it seems very simple to me:
take a cylinder and put the 3d cursor exactly in the center of it (select all vertices of one loop of the cylinder and hit shift-s, cursor to selected) then select all vertices of the cylinder and hit e for extrude and click with the right mouse button to abort. dont deselect anything but scale the extruded vertices by hitting s and moving the mouse. what you get is a ring with a rectangular cross section.
this is one solution. you could also create to cylinders and select both top loops and bridge them (its a function of a blender addon, come back to me, if you need a source for it). then repeat for the bottom loops.
if that did not answer your question, try asking again

mad man

Adam L. Gray wrote: »

Weell, basically you want a tube shape. Not sure about blender since I don't use it myself, in max there would even be a premade prim for this sort of shape, but you should learn how to do it either way.

The way I would go about it is as such (assuming I only have extrude and scale)

First extrude the center of your cylinder by 0, then scale it down, that will give you a inner circle which you can now delete.

Then select one of the inner circles in 'edge mode' and extrude one of them down to the other, and weld.

That should have you set until someone who actually knows blender comes along

walkonsky wrote: »

im not exactly sure if i understood your question right, but it seems very simple to me:
take a cylinder and put the 3d cursor exactly in the center of it (select all vertices of one loop of the cylinder and hit shift-s, cursor to selected) then select all vertices of the cylinder and hit e for extrude and click with the right mouse button to abort. dont deselect anything but scale the extruded vertices by hitting s and moving the mouse. what you get is a ring with a rectangular cross section.
this is one solution. you could also create to cylinders and select both top loops and bridge them (its a function of a blender addon, come back to me, if you need a source for it). then repeat for the bottom loops.
if that did not answer your question, try asking again

You guys had similar instructions, and I followed them but now I have another problem. I made a picture to explain.

I just want the middle gone but keeping separate faces for inside and outside (solidify modifier does not do this)

walkonsky

i dont know if im the only one here, but i really cant understand what you are trying to say. could you try to make your problem a little more clear? maybe a quick sketch might help...
btw: most people here use one of autodesks modelling tools. if you have blender-specific questions it might be a good idea to ask at blenderartists.org

Benton

Select two edges and press F to create a face.