Halloween poster time. You start with a photograph of a pumpkin and turn it into a bold vector stencil with Image Trace. You clean the stencil, put it on a night sky with a moon and a short title, and turn in a midpoint. Then you light the scene: a Radial gradient and the Screen blend mode give the moon a soft glow, and a Freeform gradient shades the pumpkin so it looks round and moonlit. Finally you export an orange poster, change six swatches, and export the same poster in Ghost Blue.
A good stencil reads from across the room. You are tracing the shape of the pumpkin, not every wrinkle in the photo.
Shortcuts are written Windows / Mac. Example: Ctrl+B / Cmd+B. On a Mac, Option is the key some Windows lists call Alt.
We build together. Follow along step by step. When you finish a step early, wait at the check line or try the bonus at the bottom. Use Illustrator only. Your poster must be original: no movie, game, or brand designs.
LastName_TrickOrTrace_Midpoint.jpg: the cleaned pumpkin stencil on the Night background, with the frame, the moon, and both lines of type. No glow yet.LastName_TrickOrTrace_Orange.jpg and LastName_TrickOrTrace_GhostBlue.jpg: the same poster with the moon glow, in two palettes. If the instructor calls the one-colorway cut, turn in Orange only.LastName_TrickOrTrace.ai file for yourself. Do not upload it.TrickOrTrace_StudentFiles.zip: today's files. Unzip it before Step 1.Pumpkin_Class_Pexels_673073.jpg: inside the zip, in the Starter folder. A 1920 by 1277 px photo by Miguel Á. Padriñán on Pexels. One pumpkin, a tall stem, a gray background, and a shadow on the floor. The background and the shadow are not part of your stencil.TrickOrTrace_Orange.ase: inside the zip, in the Palette folder. It holds all seven named swatches for the working poster. In Step 7 you edit these swatches to the Ghost Blue values in the table below.Bat_Fallback.svg: inside the zip, in the Bonus folder. Only needed for the bonus bat brush.These are finished examples made in Illustrator by following this walkthrough. Your pumpkin's edge, your title, and your glow will not match exactly, and that is fine.
The Orange ASE file contains all seven named colors: six core colors and one optional Stem color. Load it in Step 1 and make sure the swatches are global. Always apply a color by clicking its named swatch in the Swatches panel. Do not type the hex code on individual objects. That link is what lets one swatch edit recolor the whole poster in Step 7. Step 7 gives you the Ghost Blue values to type in.
| Swatch | Orange version | Ghost Blue version | Used on | ||
|---|---|---|---|---|---|
| Night | #263653 | #29435C | Background | ||
| Moon | #FFF0C2 | #F4F5FF | Moon and title | ||
| Pumpkin | #F4A340 | #7FB2E5 | Traced pumpkin | ||
| Glow | #F8D46B | #A9C9FF | Bright center of the moon glow | ||
| Pumpkin Light | #FFD99A | #DDEFFC | Moon-facing side of the pumpkin (Freeform) | ||
| Pumpkin Shade | #C9671E | #4F7FB5 | Shadow side of the pumpkin (Freeform), optional rib lines | ||
| Stem | #7FA046 | #A8C6B0 | Optional stem | ||
| Photoshop | Illustrator |
|---|---|
| Threshold adjustment: every pixel turns black or white | Image Trace in Black and White mode does the same, then draws vector paths around the black. |
| Layer blend mode menu in the Layers panel | Blend modes live in . Screen works the same way: it can only lighten. |
| Gradient tool, linear or radial | Same Linear and Radial types, plus Freeform: you click color points anywhere inside a shape, and the colors blend between them. Radial is for even light from a center. Freeform is for uneven light on an irregular shape. |
| Changing a Solid Color fill layer updates the fill | Editing a global swatch updates every object that uses it, all at once. |
| Lock icon in the Layers panel | , Ctrl+2 / Cmd+2. Unlock all with Ctrl+Alt+2 / Cmd+Option+2. |
| Start | Minutes | What | How |
|---|---|---|---|
| 0:00 | 2 | Opening: the photo and the target poster | Demo |
| 0:02 | 6 | Step 1: Start the poster and load swatches | Do along |
| 0:08 | 11 | Step 2: Trace the pumpkin | Do along |
| 0:19 | 9 | Step 3: Expand and clean the stencil | Do along |
| 0:28 | 9 | Step 4: Build the poster | Do along |
| 0:37 | 3 | Step 5: Midpoint turn-in | Gate |
| 0:40 | 10 | Step 6: Light the scene: Radial glow and Freeform pumpkin | Do along |
| 0:50 | 10 | Step 7: Export Orange, recolor, export Ghost Blue | Turn-in |
| 1:00 | Core ends. Midpoint and both finals turned in. | ||
| 1:00 | 8 | Step 8: Bonus bat Scatter brush | Bonus, ahead students only |
TrickOrTrace_StudentFiles.zip. In Illustrator, choose . Make one artboard, Width 1800 px, Height 1200 px, Color Mode RGB. Click Create.LastName_TrickOrTrace.ai, format Adobe Illustrator (ai). Click Save, then OK in the options box.Palette/TrickOrTrace_Orange.ase from the unzipped files.Pumpkin_Class_Pexels_673073.jpg from the Starter folder, and click once on the artboard. The photo is bigger than the artboard and hangs off the edge. That is expected. You scale the pumpkin later. Keep the photo selected.128). At the bottom of the panel, read the Paths count. This is what an untuned trace looks like.175. Click the arrow next to Advanced and type Paths 20%, Corners 30%, and Noise 50 px. Wait for the preview to update.
V and click the white part of the trace. Only the white shape should highlight. Press Delete. If the pumpkin highlights too, do not delete: click the gray area and try again.M for the Rectangle tool. Draw a wide rectangle over the shadow strip, with its top edge where you want the pumpkin's flat bottom. Make it wider than the shadow on both sides.V. Shift-click the pumpkin so both the rectangle and pumpkin are selected. Open and click Minus Front (the second button in the top row). The shadow and the bottom sliver of pumpkin disappear. If it cut too much, Undo and draw the rectangle lower.M and draw a rectangle that goes past all four edges of the artboard. Click the Night swatch for the fill and set the stroke to None. Choose .M, click once on the artboard, and type Width 1704 px, Height 1104 px. Click OK. Set the fill to None, click the Stroke square, click the Moon swatch, and set the stroke weight to 3 pt. In the Align section of the Properties panel, click Horizontal Align Center and Vertical Align Center. With one object selected, Illustrator centers it on the artboard, so the frame sits 48 px inside every edge. If it does not move, open the Align menu in that section and choose Align to Artboard, then click the two buttons again.V and click the pumpkin. Hold Shift and drag a corner handle to scale it. Place it low on the left, big enough to feel heavy, with its flat base just above the bottom of the frame.L for the Ellipse tool. Click once in the upper right of the artboard and type Width 320 px, Height 320 px. Click OK. Click the Moon swatch for the fill and set the stroke to None. Leave clear space between the moon and the pumpkin.T, click in an open area, and type a short original title, such as AFTER DARK. Press V, then click the Moon swatch. Pick a plain, bold font and make it big enough to read zoomed out.T, click below the title, and type a short all-caps line, such as ONE NIGHT ONLY / OCTOBER 30. Apply the Moon swatch and set the size to about 28 pt. Open and set Tracking to 200. Line up its left edge with the title's left edge. Keep both lines plain: no effects.LastName_TrickOrTrace_Midpoint.jpg. Set the format to JPEG, check Use Artboards, and leave Suffix unchecked if your dialog shows it. Click Export.LastName_TrickOrTrace_Midpoint.jpg to Canvas as your midpoint.
-01, rename it to match before you upload. If art is cut off, export again with Use Artboards checked.Two gradients, two jobs. A Radial gradient makes even light that spreads from a center, which is what a glowing moon does. A Freeform gradient lets you place colors anywhere on an irregular shape, which is what moonlight on a pumpkin does.
Part A: Radial glow on the moon
V and click only the moon. Copy with Ctrl+C / Cmd+C, then choose , Ctrl+B / Cmd+B. A copy lands right behind the moon, already selected. This copy is the halo.200%, and click OK. The halo grows from its own center to twice the moon's size and stays lined up behind it.0%. The glow now fades out before the edge.Part B: Freeform shading on the pumpkin
First, know the panel. With a Freeform gradient selected, the Gradient panel shows these controls:

| Control | What it does | Today |
|---|---|---|
| Type | Linear, Radial, or Freeform. The third button is Freeform. | Freeform |
| Draw: Points | You place separate color points, and the colors blend between them. | Use this |
| Draw: Lines | You draw a path of points, and color flows along the line. | Not today |
| Stop | Shows the point you have selected. The trash can deletes it. | Use to delete points |
| Method | How the colors blend. Classic is the standard blend; Smooth blends more gradually. | Leave on Classic |
| Color button (eyedropper and palette, left side) | With a point selected, opens the colors so you can pick a swatch for that point. | Pick swatches here |
| Opacity | How see-through the selected point's color is. | 100% on every pumpkin point |
| Spread | How far the selected point's color reaches before it starts blending. Higher spreads the color wider. | Values in the table below |
V and click the pumpkin. In the Gradient panel, click the Freeform Type button and make sure Draw is set to Points. Illustrator adds a few points on its own. Each point is a small circle on the pumpkin.| Point | Where | Swatch | Opacity | Spread |
|---|---|---|---|---|
| 1 | Upper right of the body, the side facing the moon | Pumpkin Light | 100% | 40% |
| 2 | Middle of the body | Pumpkin | 100% | 60% |
| 3 | Lower left, near the edge | Pumpkin Shade | 100% | 30% |
| 4 | Bottom edge, a little right of center | Pumpkin Shade | 100% | 30% |

Only if you finished Step 6 early. If you are on pace, go straight to Step 7.
What you are making: six thin rib lines and a green stem, drawn on top of your shaded pumpkin. The shading stays visible underneath. The picture shows the four moves.

Two habits for this whole section:
V before you click empty space. Clicking the canvas with the Ellipse or Rectangle tool opens a size box instead of deselecting. If that box appears, click Cancel.Part 1: Set up
#7FA046 from the Orange library to your document Swatches panel. Check that it shows the white Global triangle.V and click the pumpkin. Copy with Ctrl+C / Cmd+C, then choose , Ctrl+F / Cmd+F. The copy lands exactly on top and stays selected.Why a copy? Draw Inside removes the fill from the shape you draw into. Using a copy means the copy goes blank, and your shaded pumpkin underneath still shows.
Part 2: Ribs
L. Point at the middle of the pumpkin body (straight below the stem, halfway down). Hold Alt (Windows) or Option (Mac) and drag outward. Stop when the ellipse is:3 pt (in the Properties panel)55%100%Part 3: Stem
M. Drag a rectangle that covers the whole stem with room to spare: start above and left of the stem tip, end past the stem's right side, and put the bottom edge where the stem meets the body. Any part of the stem the rectangle misses stays orange.Part 4: Finish
V, click empty space, and zoom out. Save with Ctrl+S / Cmd+S.A, click each rib line, and set its fill to None. If a curve shows inside the stem, the stem rectangle is not on top: select it and choose . If part of the stem is still orange, select the rectangle and drag its edge to cover the rest. If the lines look too heavy, select them and set the stroke to 2 pt.For Ghost Blue in Step 7: also change Stem to #A8C6B0. The ribs use Pumpkin Shade, so they recolor on their own. Check both JPEGs.
LastName_TrickOrTrace_Orange.jpg with , JPEG, Use Artboards checked, and the same JPEG Options as the midpoint.29435C, and click OK. The background changes without selecting it. Do the same for Moon F4F5FF, Pumpkin 7FB2E5, Glow A9C9FF, Pumpkin Light DDEFFC, and Pumpkin Shade 4F7FB5. If you added the optional stem, also change Stem to A8C6B0.G for the Gradient tool to show its stops or points. Double-click the one that did not change and pick the matching Ghost Blue swatch. Check that the halo is still on Screen.LastName_TrickOrTrace_GhostBlue.jpg the same way. Save the .ai file.Only after both final JPEGs are uploaded.
Bat_Fallback.svg from the Bonus folder in the gray area off the artboard. Or draw your own one-piece bat silhouette.B for the Paintbrush. Paint a short curved path that crosses the moon. Make sure the new brush is the one selected in the Brushes panel.LastName_TrickOrTrace_Midpoint.jpg uploaded at the midpointLastName_TrickOrTrace_Orange.jpg uploadedLastName_TrickOrTrace_GhostBlue.jpg uploaded (unless the one-colorway cut was called)LastName_TrickOrTrace.ai saved for yourself (not uploaded)| Problem | Fix |
|---|---|
| The trace preview is full of speckles. | Lower Paths and Corners, or raise Noise. Judge the outside edge, not the skin. |
| The stem breaks off the body. | Raise Threshold in steps of 5 until the stem and body connect. |
| The gray background traces as black. | Lower Threshold in steps of 5. |
| The shadow is stuck to the pumpkin. | Expected. After Expand, draw a rectangle over the shadow and use Minus Front. |
| I cannot click separate pieces. | Expand first, then Ungroup with Ctrl+Shift+G / Cmd+Shift+G. |
| A big white rectangle is still there. | Click the gray area to deselect, then click the white shape and delete it. Do not delete the artboard. |
| I deleted my pumpkin. | Undo with Ctrl+Z / Cmd+Z. Deselect first, then click only the white. |
| Minus Front cut away too much pumpkin. | Undo and move the rectangle lower. |
| White shows at the edge of my JPEG. | The background rectangle does not cover the artboard. Unlock all, stretch it past every edge, and lock it again. |
| The glow has a hard circle edge. | Select the halo and set the right gradient stop to 0% Opacity. |
| My pumpkin's color disappeared when I used Draw Inside. | Draw Inside removes the fill from the shape you draw into. Undo back to before Shift+D, then Paste in Front a copy of the pumpkin and use Draw Inside on the copy. |
| My ribs make the pumpkin look gray or muddy. | The ellipses have a fill. Press A, click each rib line, and set its fill to None. |
| A curved line shows inside the stem. | That is the top of a rib ellipse. Draw the Stem rectangle after the ribs so it covers them, or select the rectangle and choose . |
| My ribs are uneven or not centered. | Delete all but the first ellipse, then use Object > Transform > Scale with Non-Uniform 55% and Copy, so every rib shares the same center and height. |
| The pumpkin looks blotchy or striped. | Delete extra Freeform points, lower their Spread, or move them farther apart. |
| The moon looks washed out. | Set the moon back to Normal in the Transparency panel. Only the halo uses Screen. |
| One object did not recolor. | Select it and click its named swatch. For a gradient, press G, double-click the stop or point that did not change, and pick the Ghost Blue swatch. |
| My JPEG is huge or tiny. | Export again with Resolution set to Screen (72 ppi). The file should be 1800 by 1200 px. |
| My file name ends in -01. | Rename the JPEG to match the turn-in name before you upload. |
| The JPEG cuts off art. | Export again with Use Artboards checked. |
| I cannot find a tool. | Tools hide in groups. Click and hold a tool that has a small triangle in its corner. |
Image Trace gives you a starting shape, not a finished one. Expanding and cleaning it is the real work: deleting what you do not need and cutting a messy edge into a clean one with Pathfinder. Global swatches turn a palette into a system, so one edit travels through the whole design. A Radial gradient makes even light from a center, and a Freeform gradient shapes light across an irregular object. Screen lets light interact with what is underneath it. You use blend modes again when you put artwork on mockups in Session 6.
M, Ellipse tool L, Type tool TGBStarter photo: Miguel Á. Padriñán, Pexels.