Blender 3d Modeling Tutorials

Discussion and information relevant to creating special missions, new ships, skins etc.

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maaarcooose
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Re: Blender 3d Modeling Tutorials

Post by maaarcooose » Thu Jun 16, 2011 9:35 am

Probably a simple question, but if I've done a subdivision into 4 squares on each side, how would I say divide one of the faces into 2 triangles, corner to corner?

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Re: Blender 3d Modeling Tutorials

Post by Staer9 » Thu Jun 16, 2011 10:11 am

maaarcooose wrote:Probably a simple question, but if I've done a subdivision into 4 squares on each side, how would I say divide one of the faces into 2 triangles, corner to corner?

!m!
How to triangulate quads (make squares triangles):

First select the square, then (still in edit mode) press space,
Type 'quads' in the search bar (this is also a good way of finding other functions)
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select 'quads to tris' and the square will be replaced with two trianges.

this also tells you that the hotkey is 'Ctrl > t'
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Re: Blender 3d Modeling Tutorials

Post by maaarcooose » Thu Jun 16, 2011 10:16 am

Staer9 wrote: How to triangulate quads (make squares triangles):

First select the square, then (still in edit mode) press space,
Type 'quads' in the search bar (this is also a good way of finding other functions)
select 'quads to tris' and the square will be replaced with two trianges.

this also tells you that the hotkey is 'Ctrl > t'
Awesome. Thanks for the quick response.

This tutorial thread gets better and better.

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Re: Blender 3d Modeling Tutorials

Post by maaarcooose » Thu Jun 16, 2011 10:22 am

One thing with that though, how do you define which corners the triangles divide from and to?
By doing that, all 4 squares are divided into triangles top right to bottom left.

What if you want all the divisions to go inwards to the centre point?

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Re: Blender 3d Modeling Tutorials

Post by maaarcooose » Thu Jun 16, 2011 10:47 am

It's okay...

After some messing around I've worked it out.

Select 2 vertecies, hit f (Make Face/Edge)

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Re: Blender 3d Modeling Tutorials

Post by Staer9 » Thu Jun 16, 2011 10:50 am

and of course you can do it this way: (but it might take longer)

First select the face then press delete and select the 'only faces' option,
then select the three vertexes you want to be made into one triangle and press 'f',
then select the other three and press 'f'...

if you want this to be done over your entire model it may take some time
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Re: Blender 3d Modeling Tutorials

Post by RyanHoots » Tue Jun 21, 2011 1:44 pm

How would you do textures in blender? Is there a way similar to Wings 3D where you can make a diffuse map?
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Re: Blender 3d Modeling Tutorials

Post by Staer9 » Tue Jun 21, 2011 4:52 pm

RyanHoots wrote:How would you do textures in blender? Is there a way similar to Wings 3D where you can make a diffuse map?
Make a texture (as explained in the texturing tutorial),
colour it white with the texture paint mode,
save you blender file,
go to image > pack as PNG in the texture window,
go to image > Unpack in the texture window, then choose 'create textures // untitled'

you should now have a texture in a folder where your model was saved, with white on a black background, you may have to add the .png suffix to the name.

Tomorrrow I will update the texture tutorial to include this information, and hopefully in more detail.
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Re: Blender 3d Modeling Tutorials

Post by RyanHoots » Tue Jun 21, 2011 7:02 pm

Staer9 wrote:
RyanHoots wrote:How would you do textures in blender? Is there a way similar to Wings 3D where you can make a diffuse map?
Make a texture (as explained in the texturing tutorial),
colour it white with the texture paint mode,
save you blender file,
go to image > pack as PNG in the texture window,
go to image > Unpack in the texture window, then choose 'create textures // untitled'

you should now have a texture in a folder where your model was saved, with white on a black background, you may have to add the .png suffix to the name.

Tomorrrow I will update the texture tutorial to include this information, and hopefully in more detail.
Thanks, I hope to start modelling after I download Blender.
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Re: Blender 3d Modeling Tutorials

Post by mandoman » Thu Jun 23, 2011 1:07 am

This is how far I got on my Kzin Carrier before I got stuck:

http://img607.imageshack.us/img607/1976 ... xample.png

The top should be a bubble, with portholes, while the other protrusions would be weapons emplacements, and antenna.
When I go beyond this step, however, I end up with a mess. I don't understand the "Unwrap" process, and why it is necessary. The artistic side of me just wants to take what is pictured, and start smoothing it out, detailing it, and painting it with appropriate shadow textures. I take the steps you describe, and get basically where I'm suppose to be, but it doesn't make sense to me, and when I texture paint, it just looks like a mess. Could you tell me what it is I'm doing wrong, or if my image is just plain out of whack? Thanks.
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Re: Blender 3d Modeling Tutorials

Post by Staer9 » Thu Jun 23, 2011 9:07 am

Firstly, congratulations for getting this far!

The "unwrap" process is Basicly just a way of making the 3d model 2d, this enables a texture to be put onto it. It is not neccessary to use the texture-paint mode and I will happily admit that it is aweful. what you can do after unwraping the texture is save it as a .png file and edit it in Gimp/Photoshop, that way you will have much more freedom to create the sort of texture you want, however, you will be unable to see what it looks like in real-time. You will have to keep saving the image and loading it into blender.

But more importantly this is not a texture tutorial thread. If you do plan on texturing use these steps:
Make a texture (as explained in the texturing tutorial),
colour it white with the texture paint mode,
save you blender file,
go to image > pack as PNG in the texture window,
go to image > Unpack in the texture window, then choose 'create textures // untitled'
then visit one of the texture tutorial threads for tips from the Skinners.

If you feel that you are unhappy with your model and want to add more detail, go for it. To make it look smooth press 'w' then click 'Shade smooth'

Unfortunately there is a slight problem with your model:
The weapons are single edges, you will need to make them faces or they will be invisible to Oolites gaming engine.

But other than that there is nothing you are doing wrong (one thing that you shoud try is selecting the whole model in edit mode and pressing Ctrl > n at the same time, this will fix all the normals (don't worry about the technical term, just do it anyway))
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Re: Blender 3d Modeling Tutorials

Post by mandoman » Fri Jun 24, 2011 6:48 pm

I did what you suggested and tried using Gimp to further the design of the Kzin Ship, and I did get it a little closer to what I had in mind, but it needs a lot more work. I posted this in Skinner's Den, asking for advice, and I'm waiting for a response. I wish I knew what I was doing better, as I feel like I'm groping in the dark. Here is the latest rendition of the Kzin Carrier/Battle Cruiser:

http://img715.imageshack.us/img715/981/kzinship5.png
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Re: Blender 3d Modeling Tutorials

Post by DaddyHoggy » Fri Jun 24, 2011 6:52 pm

mandoman wrote:I did what you suggested and tried using Gimp to further the design of the Kzin Ship, and I did get it a little closer to what I had in mind, but it needs a lot more work. I posted this in Skinner's Den, asking for advice, and I'm waiting for a response. I wish I knew what I was doing better, as I feel like I'm groping in the dark. Here is the latest rendition of the Kzin Carrier/Battle Cruiser:

http://img715.imageshack.us/img715/981/kzinship5.png
Why don't you post a link to your 3D model and to your texture as is and somebody could see how you've textured it already and perhaps offer suggestions of how to texture it better? All we've got at the moment is a red, not quite a sphere to work on.

I don't use Blender I use Wings3D and AC3D but I do use GIMP to produce my textures, so I might be able to help a little bit (and Simon B did some excellent GIMP texturing tutorials somewhere on the BB - if I find them - I'll post the link(s))
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Re: Blender 3d Modeling Tutorials

Post by mandoman » Fri Jun 24, 2011 8:26 pm

OK, here is the basic structure:

http://img819.imageshack.us/img819/1976 ... xample.png

Here is the structure unwrapped:

http://img225.imageshack.us/img225/8084 ... inship.png

Once again, I know I have a long way to go with texturing, and shading.
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Re: Blender 3d Modeling Tutorials

Post by DaddyHoggy » Fri Jun 24, 2011 8:42 pm

I was hoping you'd post a link to the actual 3d model file - so that somebody else could find a way to break it up "better". Looking at your unwrap (is that a blender default) - you haven't got a hope in hell of texturing it. A nice unwrap will have each of the polygons as flat as possible - yours still has much of curvature of the shape transposed on to the flat 2D plane of the texture - so some of the polygons are only a few pixels across even though they're exactly the same size (on the model) as another polygon that on the texture plane is many tens of pixels across - so you can't possibly put a nice texture on that.

Unwrapping is a horrible process to do well - and you've picked a particularly gruesome shape to try - in something like Wings3D you can force a hard edge and perform a spherical unwarp, much like running a knife through an orange peel top to bottom (pole to pole) in one line and unpeeling it and pressing the peel flat onto a sheet of paper. That's the position you need to get into - an unfolded shape with as many of the polygons "flat" (correct shape) on the surface of the texture map as possible.

Don't be disheartened but I hope this helps!
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