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How to: Approach modeling and texturing a building

A little while ago, I suggested starting a series of "How To" threads about learning how to do some of the popular things in 3d art modeling as there are many different approaches for doing one thing. For example, this thread being about a building, do you:
  • model a brick in 3d, copy it multiple times to make a brick wall,export that entire wall in to zbrush and damage each idividual brick to then pull out a diffuse for a low poly plane the same size as that wall
  • create one single brick in 3d, take it to zbrush, scuff up that one brick and flip around and create a tilable texture in zbrush that you then put on to a low poly plane (different then the first option since this is a tilable texture vs. a wall with specific scratches and damage in specific locations)
  • make modular pieces and upwrap each piece instead, and if so, do you just slap a tilable texture on each one of those wall pieces or do you texture each piece in a diffuse map in photoshop
  • If you are planning on taking it in to a game engine, do you build it to a grid in your 3d program of choice? do you say forget and just build?

and even then, there are so many things to do in between each one of those steps and tricks that could change the outcome from each one of those steps. So I propose this:


Task
Create a small two story brick building, 2 windows and 1 door.

model and texture it however you desire. (lets keep those textures to game size.)

import it to a game engine of your choice.

But during your process of doing so, take a few screen shots, take notes, or even video if you'd like, that way we can all share our process of producing great art.

My reason for doing this is to spread knowledge. I see so much great art shown on this site, and thought how great it would be to share all of this great knowledge; The small tips and tricks that others might not know; that tip that might help one artist turn their piece from good to great.
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