该教程的前置:

3D Sculpting with Photos(stone and snow)-Part1简介: 这是搬运自youtube的一个系列视频教程,介绍了从雪的雕刻,到贴图制作,到keyshot最终渲染的工作流程。原…
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简介:

这是搬运自youtube的一个系列视频教程,介绍了从雪的雕刻,到贴图制作,到keyshot最终渲染的工作流程。原视频链接

这是该教程的第二部分:制作置换、法线及高光贴图。

Chapter2:Creating Displacement map, bump, Diffuse and specular maps

In chapter 2, using your tileable texture map as a base, we will learn how to paint displacement, bump, diffuse and specular maps. We will also learn how to control displacement map values by understanding how positive and negative displacement is controlled with RGB color mapping.

The displacement map is like this, the white….the black values are where I think that maybe there should be a negative displacement that would go in a downward direction.3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Just like this place, should be all black.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Look at this picture:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
The 255 means:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
The 0 means:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
128 means:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Let's turn back to our first stone picture, and this displacement map is like:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
(this is a basic idea)

Then we talk about how to deal with it.
First, we should open the info of this picture, then use the cursor to notice over here, record some color that we can use when we paint the displacement map.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
We can find mid gray value in this picture to adjust the color of this a little bit bright.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Create a new layer which one will call white and it's gonna be our positive displacement, and obviously we should also create 'black':
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Use white brush to paint positive displacement here
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Go to black layer to paint black:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
We encourage everyone of you to take more photos and make your own displacement map so here you start to get a basic idea of what we can do and the idea would be you would continue to do this for the entire piece.
Use lasso to find really specific shapes that you want. And give this a small feather, then we can paint a nice white place. The black place can also like this.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
We can us [ctrl H] to hide the Selection range and also use [ctrl H] to display it.
Give it a little bit more blend to get a lot more precision:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
To have our base, we turn back to the layer [background copy] (the brighter one) and do a filter Gaussian blur, and the idea of this is to just remove most of the fine fine detail because that we can turn into a bump map later.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
So let we fast forward and show you the final displacement map looked like:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™

3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
This is the final displacement map that I'm going to use in a few minutes in Zbrush
And the other thing I might want to do is just quickly make a speck or a bump map.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Duplicate this
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Ctrl I to invert it
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Do blur on this:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Level:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Then try different values. The idea is to get one that removes the really dark crack values. Soft light looks pretty good.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Change level, we can have a little bit of bump that's going through and cutting through in these areas. Save this off to be our bump.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Then let's make a spec map same kind of techniques.
Duplicate the layer:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Come to image hue/saturation make sure this doesn't have any color in it
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Then go to levels. This one I really want the     dark areas to get almost no speck. We should to give off some information.
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
It's speck
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Finally, the first layer is diffuse:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Displacement map:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Bump map:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™
Specular map:
3D Sculpting with Photos(stone and snow)-Part2-魔法森林™

该教程的后置:

3D Sculpting with Photos(stone and snow)-Part3该教程的前置: 简介: 这是搬运自youtube的一个系列视频教程,介绍了从雪的雕刻,到贴图制作,到keyshot最终渲…
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