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Now that we understand how to apply materials to our scenes, let's go ahead and edit those materials. Now I've taken the same house and I've added a brick texture to it and let's go ahead and work with that. We can edit materials using Window>Materials and we'll go back into our Material Editor window. If we want to work on a specific material, we have to select it from the model. So in this case, I'm going to play with the brick wall. So let's go ahead and do a Sample Paint and then just hover over some of those bricks and then just left click and you'll see that it comes up here as my material.
I'm in the Select tab here, but if I want to edit this, I'm going to go over to the Edit tab and in this, we can actually change a lot of things about the image. Now the first thing we want to look at is the actual scale of the texture; when you scan in or bring in a material, you have to tell it how big it is. So how big are these bricks? Well, in this case, Google is telling me that it's using a texture called Brick_Tumbled.jpg. I want to make sure that you don't click this box off here which is this texture image, because when you do that, it'll go ahead and erase the texture, and then you have to go search your hard disk to get it, so we don't want to do that at this point.
So go ahead and make sure that you don't click this off. But let's go down to these two options here which are the dimensions of the image with these particular dimensions are saying is that this image is three feet across and 1'6" tall so that's how big those bricks are. Now if we want to change the scale of those bricks, all we have to do is type in a number. Let's say, we want this image to be, say, 5 feet, so I am going to type 5 and feet and when I type 5 feet, notice how the brick texture gets bigger.
Also notice how these two are locked together. So you can lock together the aspect ratio here, either you can turn that on or off. When it's on, it's a chain that's locked together; when it's off, that's broken. If I break that then I can change the aspect ratio of this. So if I wanted the bricks to be really narrow, I can say, put 1 foot bricks in and then squish vertically, or I can make them 10 feet, and then they'd stretch vertically, but I really don't want to do that.
I want to just make it, say, 2 feet or so and put it back to normal. Now another thing you can do is you can actually change the color of the texture. We have up here a color wheel and if I just move this around, you can see how I can actually change or tint the colors in this. So this is just adding to the existing colors. I can also go here and make it brighter or darker. Probably a more interesting way to do this is to actually colorize the texture and what this will do is go ahead make it into grayscale and then allow you to colorize this.
So this will probably give you a little bit more accurate results. So this is with Colorize on; with it off. Again, what it's doing is just adding that color to the existing colors, but when you colorize it, it turns it into a grayscale and then colorizes it. Now if I want, I can also colorize from existing colors. So if I want, I can match the color of an object in a model or match the color of anything on the screen and both of these work about the same way. So if I select match color of anything on the screen, it brings up an eyedropper and I can put that over anything I want.
So let's say I wanted the pink of this eraser. Just click on that and it'll find that pink, or If I wanted to say the green of the ground or the blue of the sky, whatever I want. And let's go ahead and I'm going to select may be a gray from the roof, and then I'm going to kind of dial up back and turn off Colorize. Now one more thing I want to show you is Opacity. We can also make materials opaque, so all you have here is an opacity slider and it defaults to 100 which is completely opaque, but if I dial that down, notice how this becomes more transparent.
When I dial this down, also notice how the back walls are basically a different color. So that's because you can actually texture both sides of a polygon with different textures, so I could have the front be one material and I could have the back be another material and this is what we're seeing here. So as I spin this around, you can kind of just see through; this is almost like an X-Ray view or something, but that's just the basics of Opacity. So this is opaque from the front, but not from the back. So these are some ways to edit and refine the materials that you find within SketchUp.
Now remember, you can change the scale of the texture, you can affect the color as well as the Opacity.
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