许多数字艺术家的基本工具是改变画笔或其他工具的不透明度。这可以帮助实现特定效果或保持笔触轻巧以快速构建它们。如果您使用的是 iPad艺术程序(art program) Procreate，您肯定想知道如何更改不透明度级别，以便充分利用该应用程序。
实际上，您可以通过多种方式更改 Procreate 中的不透明度，(Procreate)具体取决于您尝试使用它的方式。在本文中，我们将解释不透明度在程序中的工作原理，以及您可以更改和使用它的不同方式。
如何更改工具的不透明度(How To Change Opacity for Tools)
当你启动Procreate并打开一个项目时，你会看到一些带有一些功能的不同工具栏。要在Procreate(Procreate)中更改不透明度，您最需要注意屏幕左侧的侧边栏。此外，选择您要使用的工具，因为您可以分别设置画笔工具(brush tool)、涂抹工具(smudge tool)或橡皮擦的不透明度级别。
这是使用滑块更改不透明度的方法。
- 在左侧边栏中，使用最底部的滑块。
- 点击(Tap)并按住滑块。向下拖动可降低不透明度，向上拖动可增加不透明度。
- 现在，使用您在画布屏幕上(canvas screen)选择的工具来查看其不透明度的变化情况。您可以随时返回滑块根据需要进行调整。
您还可以在Procreate中单独更改任何画笔的不透明度级别。(opacity level)画笔设置中有几个不同的选项可用于更改不透明度。在这里，我们将重点介绍几个主要选项。
- 点击画笔工具( Brush tool)，找到您要使用的画笔并点击它。
- 在画笔设置中，转到Properties。
- 在底部附近，您会看到Maximum Opacity和Minimum Opacity选项。首先(First)，您需要更改最小不透明度(Minimum Opacity)，根据您用铅笔施加的压力，画笔可以达到的最低不透明度。
- 现在，您可以更改最大不透明度(Maximum Opacity)，这是画笔整体可以达到的最大不透明度。如果您不希望压力以这种方式产生影响，您可以使最小和最大不透明度级别相同。
在画笔设置中，您还可以转到Apple Pencil设置以进一步更改不透明度：
- 在Apple Pencil下，转到压力(Pressure)下的不透明度(Opacity)。
- 在此处更改不透明度将根据使用画笔时施加的压力来更改不透明度级别。
就压力而言，预览中笔触(brush stroke)的中间是施加最大压力的地方，而末端则显示施加压力较小的地方。
如何更改图层的不透明度(How To Change Opacity for Layers)
在某些情况下，您可能想要更改整个图层的不透明度。这可以是添加效果的快速方法，或者如果您正在绘制草图，它可以帮助您在初始草图上 进行线条工作。(line work)
- 打开右上角 的图层菜单，带有两个重叠的正方形图标。(Layers)
- 选择要更改不透明度的图层，然后用两根手指点击它。
- 图层菜单(Layers menu)将关闭，您会在顶部看到一个标有不透明度(Opacity)的蓝色条。向左或向右滑动手指以更改图层的不透明度级别。
- 或者，您可以在菜单中点击所选图层中的 N，然后会出现(chosen layer)不(N)透明度(Opacity)滑块。
确保(Make sure)在点击之前只选择了一个图层，因为一次不能更改多个图层的不透明度。
使用不透明度的提示(Tips for Using Opacity)
与其他Procreate工具一样，在您的项目中使用不透明度有无限可能。无论您是在素描、绘画还是记下想法，不透明度都可以增加另一层深度。
添加更多现实主义(Add More Realism)
如果您尝试添加烟、雾或阴影等特殊效果，不透明度可以帮助您获得更逼真的效果。尝试使用低不透明度画笔来绘制或绘制这些效果，或者将它们绘制在单个图层中并根据需要降低图层的不透明度。
追踪线条或照片(Trace Over Lines or Photos)
最有用的不透明度用途之一是线条工作和跟踪(line work and tracing)。例如，如果你使用 Procreate 来说明，很容易在一个图层上画出草图并降低不透明度，这样你就可以在另一图层上画出更清晰的线条。
另外，如果你想追踪特定的东西，或者你正在学习如何绘画并想在参考图片(reference picture)上练习，你可以在一个图层上将照片(import a photo)导入Procreate，然后降低该图层的不透明度，以便轻松查看你的画笔抚摸它。
建立颜色(Build Up Colors)
正确使用不透明度可以改善Procreate中的绘画。它允许您在尝试描绘光影时轻轻使用画笔将颜色构建为较暗的值。
混合颜色(Blend Colors)
不透明度也可以帮助混合颜色。只需(Simply)使用要混合的颜色降低您正在使用的画笔的不透明度，然后在轻笔触中使用它即可达到此效果。
改变 Procreate 中的不透明度以获得终极创造力(Changing Opacity in Procreate for Ultimate Creativity)
掌握了不透明度后，您会发现使用不透明度成为您作品(your artwork)中不可或缺的工具。由于各种原因，它很有用，一旦你在Procreate中了解了它的方法，就很容易将它融入你正在制作的任何艺术作品中。
How To Change Opacity in Procreate
An essential tool for many digital artists is altering the opacity of brushes or other toolѕ. This can help aсhіeve specifіc effects or keep brush strokes lіght to build on them quickly. If you’re using the iPad art program Procreate, you’ll definitely want to know how to change opacity levels so you can get the most out of the app.
There are actually multiple ways you can change opacity in Procreate, depending on how you try to use it. In this article, we’ll explain how opacity works in the program, as well as the different ways you can change and use it.
How To Change Opacity for Tools
When you start up Procreate and open a project, you’ll see a few different toolbars with some features. For changing opacity in Procreate, you’ll most want to pay attention to the sidebar on the left of the screen. Also, select the tool you want to use, as you can separately set opacity levels for the brush tool, smudge tool, or eraser.
Here’s how to change opacity using the slider.
- On the left-hand sidebar, use the bottom-most slider.
- Tap and hold on the slider. Drag it downwards to decrease opacity levels or upward to increase them.
- Now, use the tool you have selected on the canvas screen to see how its opacity has changed. You can make adjustments as needed whenever you want by going back to the slider.
You can also change the opacity level for any brush in Procreate separately. There are a few different options in brush settings for altering opacity. Here, we’ll focus on a couple of the main options.
- Tap on the Brush tool, find the brush you want to use and tap on it.
- In the brush settings, go to Properties.
- Near the bottom, you’ll see options for Maximum Opacity and Minimum Opacity. First, you’ll need to change Minimum Opacity, the lowest opacity the brush can reach according to how much pressure you apply with your pencil.
- Now, you can change the Maximum Opacity, which is the maximum level of opacity the brush can reach overall. You can make both the minimum and maximum opacity levels the same if you don’t want the pressure to make a difference in this way.
In the brush settings, you can also go to the Apple Pencil setting to change opacity even more:
- Under Apple Pencil, go to Opacity under Pressure.
- Altering opacity here will change the opacity levels according to how much pressure is applied when using the brush.
As far as pressure goes, the middle of the brush stroke in the preview is where the most pressure is applied, and the ends show where less pressure is applied.
How To Change Opacity for Layers
There may be situations where you want to change the opacity of an entire layer. This can be a quick way to add an effect, or if you’re sketching, it can help you do line work over an initial sketch.
- Open the Layers menu in the top-right corner with the icon of two overlapping squares.
- Select the layer you want to change the opacity of and tap it with two fingers.
- The Layers menu will close, and you’ll see a blue bar at the top labeled Opacity. Slide a finger left or right to change the opacity levels of the layer.
- Alternatively, you can tap on the N in your chosen layer in the menu, and the Opacity slider will appear.
Make sure you only have one layer selected before tapping, as you can’t change the opacity of more than one layer at a time.
Tips for Using Opacity
Like with other Procreate tools, there are endless possibilities for utilizing opacity in your projects. Whether you’re sketching, painting, or jotting down ideas, opacity can add another layer of depth.
Add More Realism
If you’re trying to add in special effects such as smoke, fog, or shadows, opacity can help you get a more realistic result. Try using low opacity brushes to draw or paint these effects, or draw them in a single layer and lower the layer’s opacity as you see fit.
Trace Over Lines or Photos
One of the most helpful opacity uses is line work and tracing. For example, if you use Procreate to illustrate, it’s easy to sketch out a drawing on one layer and lower the opacity so you can make cleaner lines over it on another layer.
Also, if you want to trace something specific, or you’re learning how to draw and want to practice on a reference picture, you can import a photo into Procreate on a layer and then lower that layer’s opacity so it’s easy to see your brush strokes over it.
Build Up Colors
Painting in Procreate can be improved by using opacity correctly. It allows you to use brushes lightly to build colors up into darker values when trying to portray light and shadow.
Blend Colors
Opacity can also help in blending colors. Simply lower the opacity of the brush you’re using with the color you want to blend with, and use it in light strokes to achieve this effect.
Changing Opacity in Procreate for Ultimate Creativity
You’ll find that using opacity becomes an indispensable tool in your artwork after you’ve mastered it. It’s useful for various reasons, and once you understand your way around it in Procreate, it’ll be easy to incorporate it into whatever art you’re working on.
