You can add a mask layer in Krita using a shortcut that creates a clipping group with an alpha inheritance mask.
Adding a Mask Layer Through a Clipping Group
One way to effectively add a "mask layer" in Krita is by creating a clipping group. This involves grouping your desired layers and then adding a mask on top that affects only the layers within the group. This method utilizes a special type of layer mask with alpha inheritance.
Here's how to do it:
- Select the Layers: Choose the layer(s) you wish to mask.
- Use the Shortcut: Press Ctrl + Shift + G. This shortcut groups the selected layers and adds a 'mask layer' on top with alpha inheritance, thereby functioning as a clipping mask for the group.
Understanding Clipping Masks and Alpha Inheritance
When you use the Ctrl + Shift + G shortcut, you're not just adding any layer mask; you are creating a special one with alpha inheritance. What that means is:
- Layer Grouping: Your selected layers are grouped.
- Alpha Inheritance: The top 'mask layer' uses the alpha (transparency) of the layers beneath. Only the opaque parts of the lower layers are visible. Essentially, the mask layer's transparency becomes the mask for the whole group.
- Non-Destructive: This method is non-destructive, as it hides parts of a layer based on the mask’s transparency instead of erasing it.
Example Usage
- Let's say you have a base color layer and you want to add shading or patterns within a specific shape.
- First, draw your base shape on one layer.
- Then, create another layer where you draw the shading or patterns.
- Select both layers, and then press Ctrl + Shift + G.
- Now the shading/pattern layer only appears where the base layer's opaque areas are visible.
Table: How to add a Mask Layer in Krita with a Clipping Group
| Step | Action | Result |
|---|---|---|
| 1 | Select Layer(s) | Choose the layer(s) that need masking. |
| 2 | Press Ctrl + Shift + G | The selected layers get grouped, with a top 'mask layer' added that applies alpha inheritance to the group. |
