遮罩输入Mask Input

难度LEVELL2 · 进阶L2 · Intermediate 领域TOPIC调色

先学：Prerequisites: 节点工作流

学习目标LEARNING OBJECTIVES

学完你能认出节点上的蓝色箭头（Key 三角），会把一个节点的遮罩接给另一个节点，用黑白遮罩精确限制效果范围。

概念说明CONCEPTS

遮罩输入（Mask Input）是节点左侧的蓝色箭头（Key Input）——它接收一张黑白遮罩：白色区域保留该节点的效果，黑色区域移除效果，灰色按比例打折。

  • 蓝三角成对出现：节点右侧是 Key Output（输出本节点的选区），左侧是 Key Input（接收别处的遮罩）；从 Output 拖线到 Input 即完成传递。
  • 绿圆点走画面，蓝三角走选区：绿色圆点传 RGB 图像本身，蓝色三角只传"哪里生效"的黑白信息，两条线各管各的。
  • 遮罩从哪来：在节点上画窗口（见 窗口）或用限定器选色（见 限定器），该节点的 Key Output 就输出这张遮罩。
  • Outside 是自动档：Add Outside 相当于自动连线加自动反转（见 反转选区）；手动连线则把每一步攥在自己手里。

操作步骤STEPS

  1. 在节点 A 上画好窗口（或做好限定器选区）——它右侧的蓝三角现在输出这张遮罩节点右侧的 Key Output 蓝三角
  2. 新建串行节点 B，在它上面做一个明显的效果（如大幅压暗）
  3. 从节点 A 的蓝色 Key Output 拖一条线，接到节点 B 左侧的蓝色 Key Input连接两个节点的 Key 线
  4. 选中节点 B 按 Highlight 验证：窗口内正常显示（效果生效）、窗口外盖灰（受保护）
  5. 想断开时，把连线从 Key Input 上拖走即可

练习PRACTICE

动手任务

  1. 节点 A 画窗口、节点 B 做夸张压暗：先不连线看全画面变暗，再接上 Key 线，确认只剩窗口内变暗。
  2. 把同一张遮罩再接给第三个节点 C 做调色，体会"一张遮罩喂多个节点"。

自检清单

做完任务后逐条自查，全部能打勾才算过。

常见问题FAQ

蓝色箭头和绿色圆点到底差在哪？

绿圆点传画面本身（RGB），蓝三角只传选区（黑白遮罩）。接线记住：绿对绿、蓝对蓝，别混。

接上遮罩后，节点效果整个消失了？

多半是遮罩全黑或黑白反了。回来源节点按 Highlight 检查选区；需要反向效果就走 Outside 思路（见 反转选区）。

一张遮罩能同时给几个节点用吗？

可以。Key Output 可以连到多个节点的 Key Input，改一次选区处处同步（见 键信号）。

Learning Objectives学习目标

After this card you can spot the blue Key triangles on a node, patch one node's mask into another, and use a black-and-white matte to limit an effect precisely.

Concepts概念说明

The Mask Input is the blue arrow on a node's left side (Key Input) — it receives a black-and-white matte: white keeps this node's effect, black removes it, and gray applies it proportionally.

  • Blue triangles come in pairs: Key Output on the right (sends this node's selection), Key Input on the left (receives a mask from elsewhere); drag a line from Output to Input to patch it.
  • Green dots carry the picture, blue triangles carry the selection: green circles move the RGB image itself; blue triangles carry only the black-and-white "where it applies" data.
  • Where masks come from: draw a window (see Power Windows) or select by color with the qualifier (see Qualifier), and that node's Key Output carries the mask.
  • Outside is the automatic: Add Outside is auto-patch plus auto-invert (see Outside Node); manual patching keeps every step in your hands.

Steps操作步骤

  1. Draw a window on node A (or build a qualifier selection) — its right blue triangle now outputs that maskThe Key Output triangle on a node's right side
  2. Add a serial node B and give it an obvious effect (e.g. a heavy darkening)
  3. Drag a line from node A's blue Key Output to node B's blue Key Input on the leftThe key link between two nodes
  4. Select node B and press Highlight to verify: normal inside the window (effect on), gray outside (protected)
  5. To disconnect, drag the line away from the Key Input

Practice练习

Hands-on task

  1. Draw a window on node A and darken heavily on node B: first watch the whole frame darken unconnected, then patch the key link and confirm only the windowed area darkens.
  2. Feed the same mask into a third node C for color work — feel how one matte can drive several nodes.

Self-check

Work through the task, then tick every line; all checked means you own this card.

FAQ常见问题

What's the real difference between the blue arrows and green dots?

Green dots carry the picture itself (RGB); blue triangles carry only the selection (a black-and-white matte). Patch green to green and blue to blue — never mix.

My node's effect vanished after patching the mask?

The matte is probably all black, or inverted. Go back to the source node and press Highlight to check the selection; for the opposite area, think Outside (see Outside Node).

Can one mask feed several nodes at once?

Yes. A Key Output can patch into multiple Key Inputs — edit the selection once and everything updates together (see Key Signal).

深度资料：遮罩输入 →Deep dive: 遮罩输入 →

本卡术语Terms in this card

窗口Power Window 限定器Qualifier 调色Grade 节点Node 帧Frame PNGPNG