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I made a model in XSI recently, and I need a way to cut a cube area out of the model. For example, say I made a house in XSI. After I made the house, I wanted to add a door area, so you could walk in and out freely. What is an easy way to do this in XSI?
Thanks for your help.
PS: I did search for an answer. If I missed something, I'm sorry.

so i was looking for something like this but there is no way

pls correct me if i'm wrong

with the little tool "Add edge Tool" in xsi, you can make new points with edges(Modify -> Poly.Mesh=> the second point it is) and now you can select the polygon in them and press delete. but i have said to anakin earlier this day, that you must have an interior, cause the polygons only work one-way. if you only cut the door out and go into it, you will see your building invisible, noone can see you inside, but you can see all the others. so you must create an interior first, with walls and then it will work perfect.

please corect me if im wrong

Edit: for the beginning you can make a cube, select all polygons and under Modify -> Poly.Mesh press "Invert polygons", this will rotate these polygons inside, so that you can t look outside

good luck

A search for "cut into model" reveals some pretty basic results:
forums/viewtopic.php?f=36&t=12707&hilit=cut+into+model
forums/viewtopic.php?f=36&t=11473&hilit=cut+into+model

please ignore the "tutorial" in the firts link, its really obsolete.
the easiest way to di it is to select the polygon you want to have the opening in, press CTRL+d and scale the newly create polygon so it has the shape of the chamber/dooropening/whatever, then duplicate it again and move it inwards.
if you have a seperate interior you wanna connect, delete the polygon and make an opening of the same shape in the interior so both openings connect.

Thanks for all the help guys, I will be back soon with results..
EDIT
Solved! Naru's solution, and AceMastermind's solution in Mav's second link helped. Thanks!
Here are the results..
Before. After.

Alright, I want to cut a hole (cube) out of my mesh. Any tips on how to do this? I've searched extensively for an answer, but nothing has been useful.
I also tried Darth D.U.C.K's tuto, but I'm having a hard time understanding It.
Thanks for the help guys.

What exactly are you trying to make? An archway for a door?

Hint: You should turn on the 'Headlight' option to get rid of all those annoying shadows, I can also see tons of edges no doing anything that can be deleted.

If you are trying to make a "hallway" all the way though the model use boolean difference.

Step 1 save model
Step 2 freeze M on model
Step 3 select your model
Step 4 go to modify/poly mesh/boolean difference
Step 5 select the cube as the cutter (make sure it extends past both side if it is to go all the way through). you should have a hole in your mesh.
Step 6 adjust location of cube if required
Step 7 freeze M of you model once you are satisfied, if you don't freeze it deleting or moving the cube will affect the hole you cut.

wow, my tutorial was weird....im suprised anybody read it.
anyway, if both objects are pretty primitive the boolean method fragme described is the best. if they are more complex however boolean creates many unclean edges and its better to cut the hole into the bigger object manually and then insert the other object.

Boolean works well for more complex models, too, but I think they improved it sometime between 5.11 and 2011 so it might not work as well in older versions. Id use extruding in most cases, though.

A thing to remember when using boolean difference is that it "recreates" the model you use as cutter inside the cut model. As you can see in the pictures it creates the hole with exactly the same topology the cylinder(cutter) has. So if you arent cutting exact forms into models, use simple/basic geometry. Another thing are the edges it creates on the surface of the cube to support the cut. Usually they arent very efficient/nice looking, redrawing those is easy and quickly done though(use the draw edge tool; i believe its \ or / in the standard keymap).

@FragMe!: That worked like a charm, thanks. Everyone else, thanks for the tips.
EDIT

minilogoguy18 wrote:Hint: You should turn on the 'Headlight' option to get rid of all those annoying shadows, I can also see tons of edges no doing anything that can be deleted.

And how would this be done?

As simple as clicking on the area of the viewport where you display mode is seleced ex. wireframe, textured decal etc., you'll see it in that drop down menu.

There's many ways to go about what you're trying, boolean is one but I like having more control and not having to go back and redo the topology for a clean efficient (as in fewer vertex's) result. Though if you do the extrude method you'll have that one odd poly on the bottom you'll just have to go back and delete.

^Thanks for the info.

I would just use the knife tool. Make a polygon selection on the object to isolate the cut then use that cube as your snap guide, this should give greater control of your edge flow and minimize cleanup. You're not actually cutting anything, just adding edges which allow you to manipulate the geometry and there is more than one way to do this in XSI regardless of how complex the geometry is.

Result after extruding interior polygons inward then flattening with minor cleanup:

I made this model before using the knife method.. But I find that the boolean difference method faster and more accurate for the newer version.