3D Model Bruise !!!

[Chris Potts]

Hi eveyone....

 

Im new here.....I'm using 3D Viz 4 at the moment.....Still Im learning to improve from mistake in the past....

 

So, I have problem with bruise (or whatever what you call it) on 3D model when I get boolean cut out of windows and doors.

 

Here I trying explain what I did done :- ( Sorry Im not good english one )

 

1) When I get draw outline by line and arc tool on curve wall then Extrude wall to height..

2) Then I put mesh boxes in each windows position also doors too, Then merge it into one mesh object

3) Then using boolean mesh box cut out from the wall hole.

 

BUT It get shown up some bruise area ( see black stress on the wall skin on picture attachment ). I was trying to figure it out problem.

I still dont understand it......what I have gone wrong ????

 

I would appreciate someone explain or advice me

or Is there other better way to build curve wall easier....( Cuvrve wall give me nightmare one).

[STRAT]

those smudges indicate indifferent smoothing groups within the mesh. sub-select all the faces involved, and either clear all smoothing groups, or significantly lower them (to below 30 degrees atleast).

[Brian Cassil]

Strat's tip is the best way but if you want an dirtier but quicker solution you can simply add the smooth modifier make sure auto smooth is checked and play with the angle. The default value of 30 should work though.

 

Also, another tip. Booleans in Max/Viz are terrible. Avoid them whenever possible.

[Jim Mann]

But the only real way to do stop this problem is to only use booleans if you really, really, really, really have to. i.e. pretty much never.

 

The best advice that we could give you is to build the walls properly. The simplest solution would be to build each of the elevations using extruded splines/shapes. If you can create the shape to boolean cut a hole in a wall then you should be able to draw that window shape inside the shape of a wall and extrude it. Think of it as assembling the exterior from a number of elevations, each elevation being a rectangle with smaller rectangles inside it. You will get a much cleaner result that way, booleans leave a lot of mess most of the time.

 

Failing that, the smooth modifier will do.

[STRAT]

why does everyone in every max/viz related forum totaly trash the boolean function???

 

ok, it's a tad dodgy, but i use it all the time and hardly ever need to complain about it. use it correctly and it'll play ball.

[kris]

What is the best way in Max to model without using boolean function if you have situation where wall is curved and you need windows in it.

If the wall is flat I would draw it with lines including windows and extrude it, but what happens if I have to make circular tower with lots of windows.

[Brian Cassil]

What is the best way in Max to model without using boolean function if you have situation where wall is curved and you need windows in it.

 

As far as I know the only way is with booleans.

 

Strat, I agree if you follow the Max guidlines for booleans they will work fine. That means that you can only perform a boolean operation on an object once... twice if your lucky. Beyond that and your just plain asking for trouble. Other modeling programs do not have such strange limitations on compound modeling techniques like max does.

 

I truly do not understand why Autodesk/discreet does not do anything about this. There are plugins which make boolean much more usable so I know it's possible.

[Bhanu]

What is the best way in Max to model without using boolean function if you have situation where wall is curved and you need windows in it.

I struggled enough to create this tower directly on Viz 4.0. Finally resported to AutoCAD sollids and impoted into ....

[Chris Potts]

Ahhh I see Thank Strat and other person who advice/tip me..

 

I never try smoothing groups before

I will try play experiment it later soon..see how I go...

 

Cheer....

[Jim Mann]

What is the best way in Max to model without using boolean function if you have situation where wall is curved and you need windows in it.

 

There is a fairly simple solution, I'm not sure taht I can explain in any simple way but here goes:

- Draw the outside face of the curve as a series of segments.

- Ensure that segments correspond to window openings.

- Extrude the curve with sufficient height segments to allow for wall above and below the opening.

- convert the extruded object to an editable poly or mesh.

- extrude the faces inward to give you the window reveals.

- Delete the unwanted inner face.

 

Funnily enough, I am working on a curved building at the moment. Attached is an image of the in-progress model. The mesh is ready for anything I throw at it now, even radiosity. That is more than could be said if I had used booleans.

 

Jim

[STRAT]

you can always use SHAPEMERGE. this gives a much cleaner cut.

[3dp]

seems like a lot of the tips here are nice if you are working up a design from flights of fancy in the brain

howeer with real world projects and issues the only relaible method i have found if you get shadows is to undo and add in a subdivide modifier

ok it bumps up the face count but it'll get rid of the long thin faces that cause this kind of problem

i's also give a plug to powerbooleans which works pretty well most of the time but will still throw a wobbler on some actions