[Tutorial] Converting (Sketchup) Building models for Civ4 via Texture Baking

Refar

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Requested here to help convert lots of good, free models in the Google 3dwarehouse to Civ4.

This should cover the proces to collect the textures from a multi-mesh, multi-texture model (i.e. Sketchup Buildings available at Google 3D) into something useable in the game.
Some pre an postwork for polygon reduction is covered as well.

The basic idea is:
We have our multiple imported textures on the imported model, making it look good (hepefully). They use UVW channel 1. We can not however export Submaterial to the game.
We will weld the model into a single mesh
We will apply a second UVW channel 2, that will be suited for a single texture.
We will use the Render to Texture function to "copy" the texture from channel 1 to channel 2.
Then we just swap the original multi-material for our new texture.

The whole surgery takes about 30 minutes on a well suited model. More on complicated models that need the polycount reduced or even beeing remodeled.

Overall the method of texture baking is a way to take out geometry detail and put it into texture. Download high poly reference model. Use it to bake textures. Make a low poly model and apply the textures to it.
If there is serious demand for it, i would make another tutorial on modeling a low poly model from high poly reference/render to texture source.

I tried to keep it as basic as possible, including pictures for the most tools and controls used. Still it is recomended to do one or two general (beginners) modeling tutorials to get accomodated with 3DsMax.

On a side note - i know Blender has a texture baking function, so this should be possible with Blender as well. I would be interested in more insight - if some of the "Blender People" is familiar with that function.

Database Link
 
Just want to say thanks again. The tutorial goes into great detail. I hope to try to make a few buildings now.
 
I really hope there will be people to try it - too many good models on the 3D Warehouse to pass up. It's not really hard if you choose a good source model.
Dont hesitate to ask, if something is not clear.

@Johny - I inspected your Shrine-Artwork ideas on the World Religions mod. I.e those whre you had Sketchup links.

The Temple of Herod is definitely 100% beyond this method.
The All Saints Church (Protestan Shrine) is doable, but i would advise against using it for the first try - the model is a bit messy.

I would suggest using this one, for your first try:
http://sketchup.google.com/3dwarehouse/details?mid=fe41cdbcfc50c09e5918b51a266e53d4&prevstart=0

It looks quite similar to what you have in mind fo the Mani Shrine.
Is a bit more complex than my tutorial church, but very well doable.
The polycount is good (Delete the small pyramid and keep the main two on the soecket.)
You will need to flip the normals - they point inside and delete some unneeded polys (on the bottom of those round surfaces.)
 
I took a look at it (the spodek model). Looks clean enought, should be very do-able.
 
What did you mean by
"We have our multiple imported textures on the imported model, making it look good (hepefully)."

Maybe the textures are invisibly there on the imported model, but I don't see them. There isn't even a material. Yes the sketchup model is textured.

I use .3ds.

I'll try the rest of the tut. and let you know how it goes
 
The synopsis in the first post is to give somewhat experienced people a idea, so they can know what's the Tutorial is about. For details you will have to look into the tutorial itself - your questions are covered there, with pointers to where to find the tools needed.
 
:P I see.. I'm assuming that I'm supposed to follow the link and download what I'm guessing is the appropriate tutorial then?

Just wasn't sure if texture baking was what I'm trying to do or if it was something more advanced.

Kevin

EDIT: yeah nevermind, i didn't even see the download link earlier on :P
 
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