To color drop on a different layer in Procreate, set your line art layer as the Reference layer, then select a new layer above or below it and drag a color into the shape. Open the Layers panel, tap the line art thumbnail, and choose Reference. The word "Reference" will appear on the thumbnail. ColorDrop will then read the outlines from that layer and place the fill on whichever layer is active.

Step-by-Step: ColorDrop on a Separate Layer

This is the full workflow, from line art to clean flats on their own layer.

1. Put your line art on its own layer. Name it something obvious like "Lines" so you don't confuse it with fill layers later.
2. Create a new layer for color. Add it above or below the line art. Below is usually better, because the lines stay visible on top of the fills.
3. Set the line art as the Reference layer. Tap the line art layer's thumbnail, then tap Reference in the Layer Options menu. A check mark appears beside the option, and the thumbnail is labeled.
4. Select the empty color layer. This is the layer that will receive the fill.
5. Drag a color into a closed shape. Pick a color from the dot at the top right of the screen and drag it into the area you want filled. Hold your finger or Pencil down briefly instead of releasing right away.
6. Adjust the threshold if needed. While the color floods in and you're still touching the screen, a blue slider appears along the top. Slide left or right to tighten or loosen the fill.
7. Release. The color lands on your fill layer, and the line art is untouched.

To confirm it worked, hide the Reference layer. You should see only your fills, shaped to the outlines that are now hidden.

Why ColorDrop Fills the Whole Canvas

The most common complaint with this workflow is that the fill covers the entire layer. The cause is almost always one of these.

The Reference layer isn't set

Without Reference, ColorDrop looks only at the pixels on the active layer. If you're on an empty layer, there are no boundaries, so the fill spreads across the whole canvas. This is a common scenario behind "it fills everything" questions. Setting Reference is the fix.

The outline has gaps

ColorDrop treats a shape as fillable only if its boundary is closed. A tiny break in a line, even one that's hard to see, lets the color escape. Zoom in and inspect the corners where strokes meet. If you find a gap, either draw over it on the line layer or lower the threshold so the fill is less tolerant of faint edges.

Hidden or misaligned layers

Transparency, blend modes, or layers that sit slightly off can create gaps you can't see. Make sure the relevant layers are visible and aligned before you fill.

Using the ColorDrop Threshold

The threshold controls how much variation ColorDrop tolerates when deciding where a fill stops. It's the setting that makes the difference between a fill that leaves a halo of unfilled pixels and one that bleeds past a soft edge.

• Slide right to increase the threshold. The fill covers more area and reaches into anti-aliased edges, which helps remove white fringes along lines.
• Slide left to decrease it. The fill stays tighter and is less likely to leak through faint gaps.

A few practical notes:

• You have to keep continuous contact with the screen from the moment you drag the color until you finish adjusting. Lifting early, or touching the slider with a second finger, breaks the gesture.
• You can slide anywhere on the screen. You don't need to touch the slider itself.
• Procreate remembers the last threshold you set, so if your fills suddenly behave differently, check whether an earlier adjustment is still applied.

For flat color under line art, a slightly higher threshold usually works better. It pushes the fill under the edge of the line so there's no gap between color and outline once you composite them.

When Your Line Art Is Spread Across Several Layers

Reference works on one layer at a time. If your drawing is split across several line layers, such as outer contour, inner details, and an eye on separate layers, ColorDrop only sees the one marked Reference. Fills then ignore lines on the others, and the shape appears "open."

There are a few ways to handle it:

• Merge the line layers. Pinch them together, then set the merged layer as Reference. This is the simplest option, and Procreate's own support staff suggest it.
• Work from a copy. Duplicate your line layers, merge the duplicates into a single layer, and mark that as Reference. Your original layers stay separate and editable. Hide the merged copy when you're done.
• Close the shape in the line art. Sometimes the layout is the problem. If one outline fully encloses another, ColorDrop fills the entire outer object. Adding a closing line around the inner shape turns it into a "doughnut" the fill can respect.

It's a different model from apps that read all visible layers, and it takes some adjusting. The merged-copy approach is the least destructive way to keep your layer structure and still get predictable fills.

Organizing Fills for Animation and Compositing

If you're moving Procreate art into After Effects, Premiere Pro, or a 3D or node-based tool, the way you structure fill layers matters more than it does for a finished illustration.

• One layer per color region, where it matters. Separate fills for skin, clothing, hair, and background give you clean elements to animate, track, or color-correct independently. You can place several colors on one layer for static work, but separate layers are far easier to rig in a compositing app.
• Keep lines on their own layer. Line art on a Reference layer stays isolated from your fills, so you can re-time, wiggle, or restyle lines without touching color.
• Fill slightly under the lines. Use a higher threshold so there's overlap, then keep the lines on top. This avoids edge fringing after you scale or composite.
• Name and order layers consistently. A naming scheme saves real time later.
• Export with transparency. Hide any background and export layered files or PNGs so alpha comes through intact.

Once the layers are in After Effects, you can animate each region separately, apply effects per color, or pre-comp the whole set. This is the point where a clean Reference-layer fill pays off, because there's less cleanup before the art becomes motion.

Troubleshooting Checklist

If ColorDrop still isn't behaving, run through this list:

• Is the line art layer marked Reference (check mark and label visible)?
• Is the fill layer the one currently selected?
• Are the outlines fully closed, with no gaps at corners?
• Is your threshold too high (leaks) or too low (leaves unfilled edges)?
• Is the drawing split across multiple line layers? If so, merge a copy and use that as Reference.
• Did you keep contact with the screen the whole time you adjusted the slider?
• Are all relevant layers visible and aligned?

Quick Answers

Can more than one layer be the Reference layer? No. Only one layer acts as Reference at a time, which is why merging a copy of your line work is the standard workaround.

Does the fill appear on the Reference layer? Not if you've selected a different layer. The fill goes to the active layer, and the Reference layer only supplies the boundaries.

Why are there white edges around my fills? The threshold is probably too low. Increase it so the fill extends into the soft edges of the line, then keep the lines on top.

Do I need Reference if the shape and the fill are on the same layer? No. Reference is for filling on a different layer from your outlines. On a single layer, ColorDrop reads the layer you're on.

Setting Reference, checking for closed shapes, and tuning the threshold solves nearly every case. With that in place, you get flats on their own layers, ready for animation, compositing, or further processing in the rest of your pipeline.

To color drop on a different layer in Procreate, set your line art layer as the Reference layer, then select a new layer above or below it and drag a color into the shape. Open the Layers panel, tap the line art thumbnail, and choose Reference. The word "Reference" will appear on the thumbnail. ColorDrop will then read the outlines from that layer and place the fill on whichever layer is active.

Step-by-Step: ColorDrop on a Separate Layer

This is the full workflow, from line art to clean flats on their own layer.

1. Put your line art on its own layer. Name it something obvious like "Lines" so you don't confuse it with fill layers later.
2. Create a new layer for color. Add it above or below the line art. Below is usually better, because the lines stay visible on top of the fills.
3. Set the line art as the Reference layer. Tap the line art layer's thumbnail, then tap Reference in the Layer Options menu. A check mark appears beside the option, and the thumbnail is labeled.
4. Select the empty color layer. This is the layer that will receive the fill.
5. Drag a color into a closed shape. Pick a color from the dot at the top right of the screen and drag it into the area you want filled. Hold your finger or Pencil down briefly instead of releasing right away.
6. Adjust the threshold if needed. While the color floods in and you're still touching the screen, a blue slider appears along the top. Slide left or right to tighten or loosen the fill.
7. Release. The color lands on your fill layer, and the line art is untouched.

To confirm it worked, hide the Reference layer. You should see only your fills, shaped to the outlines that are now hidden.

Why ColorDrop Fills the Whole Canvas

The most common complaint with this workflow is that the fill covers the entire layer. The cause is almost always one of these.

The Reference layer isn't set

Without Reference, ColorDrop looks only at the pixels on the active layer. If you're on an empty layer, there are no boundaries, so the fill spreads across the whole canvas. This is a common scenario behind "it fills everything" questions. Setting Reference is the fix.

The outline has gaps

ColorDrop treats a shape as fillable only if its boundary is closed. A tiny break in a line, even one that's hard to see, lets the color escape. Zoom in and inspect the corners where strokes meet. If you find a gap, either draw over it on the line layer or lower the threshold so the fill is less tolerant of faint edges.

Hidden or misaligned layers

Transparency, blend modes, or layers that sit slightly off can create gaps you can't see. Make sure the relevant layers are visible and aligned before you fill.

Using the ColorDrop Threshold

The threshold controls how much variation ColorDrop tolerates when deciding where a fill stops. It's the setting that makes the difference between a fill that leaves a halo of unfilled pixels and one that bleeds past a soft edge.

• Slide right to increase the threshold. The fill covers more area and reaches into anti-aliased edges, which helps remove white fringes along lines.
• Slide left to decrease it. The fill stays tighter and is less likely to leak through faint gaps.

A few practical notes:

• You have to keep continuous contact with the screen from the moment you drag the color until you finish adjusting. Lifting early, or touching the slider with a second finger, breaks the gesture.
• You can slide anywhere on the screen. You don't need to touch the slider itself.
• Procreate remembers the last threshold you set, so if your fills suddenly behave differently, check whether an earlier adjustment is still applied.

For flat color under line art, a slightly higher threshold usually works better. It pushes the fill under the edge of the line so there's no gap between color and outline once you composite them.

When Your Line Art Is Spread Across Several Layers

Reference works on one layer at a time. If your drawing is split across several line layers, such as outer contour, inner details, and an eye on separate layers, ColorDrop only sees the one marked Reference. Fills then ignore lines on the others, and the shape appears "open."

There are a few ways to handle it:

• Merge the line layers. Pinch them together, then set the merged layer as Reference. This is the simplest option, and Procreate's own support staff suggest it.
• Work from a copy. Duplicate your line layers, merge the duplicates into a single layer, and mark that as Reference. Your original layers stay separate and editable. Hide the merged copy when you're done.
• Close the shape in the line art. Sometimes the layout is the problem. If one outline fully encloses another, ColorDrop fills the entire outer object. Adding a closing line around the inner shape turns it into a "doughnut" the fill can respect.

It's a different model from apps that read all visible layers, and it takes some adjusting. The merged-copy approach is the least destructive way to keep your layer structure and still get predictable fills.

Organizing Fills for Animation and Compositing

If you're moving Procreate art into After Effects, Premiere Pro, or a 3D or node-based tool, the way you structure fill layers matters more than it does for a finished illustration.

• One layer per color region, where it matters. Separate fills for skin, clothing, hair, and background give you clean elements to animate, track, or color-correct independently. You can place several colors on one layer for static work, but separate layers are far easier to rig in a compositing app.
• Keep lines on their own layer. Line art on a Reference layer stays isolated from your fills, so you can re-time, wiggle, or restyle lines without touching color.
• Fill slightly under the lines. Use a higher threshold so there's overlap, then keep the lines on top. This avoids edge fringing after you scale or composite.
• Name and order layers consistently. A naming scheme saves real time later.
• Export with transparency. Hide any background and export layered files or PNGs so alpha comes through intact.

Once the layers are in After Effects, you can animate each region separately, apply effects per color, or pre-comp the whole set. This is the point where a clean Reference-layer fill pays off, because there's less cleanup before the art becomes motion.

Troubleshooting Checklist

If ColorDrop still isn't behaving, run through this list:

• Is the line art layer marked Reference (check mark and label visible)?
• Is the fill layer the one currently selected?
• Are the outlines fully closed, with no gaps at corners?
• Is your threshold too high (leaks) or too low (leaves unfilled edges)?
• Is the drawing split across multiple line layers? If so, merge a copy and use that as Reference.
• Did you keep contact with the screen the whole time you adjusted the slider?
• Are all relevant layers visible and aligned?

Quick Answers

Can more than one layer be the Reference layer? No. Only one layer acts as Reference at a time, which is why merging a copy of your line work is the standard workaround.

Does the fill appear on the Reference layer? Not if you've selected a different layer. The fill goes to the active layer, and the Reference layer only supplies the boundaries.

Why are there white edges around my fills? The threshold is probably too low. Increase it so the fill extends into the soft edges of the line, then keep the lines on top.

Do I need Reference if the shape and the fill are on the same layer? No. Reference is for filling on a different layer from your outlines. On a single layer, ColorDrop reads the layer you're on.

Setting Reference, checking for closed shapes, and tuning the threshold solves nearly every case. With that in place, you get flats on their own layers, ready for animation, compositing, or further processing in the rest of your pipeline.