Draw a floating rubber duck in Aquarell: show exposed and submerged parts with a waterline

A blue horizontal line alone does not put a toy into water: the waterline must wrap around the duck with consistent front/rear overlaps. Draw a yellow rubber duck with most of its body exposed and only a small lower portion submerged. Focus on visible boundary relationships without calculating buoyancy or specifying a real toy’s draft. All ripples, reflections and forms are drawn manually in Aquarell, not presented as automatic water or physics simulation.

Choose the toy pose and water level

Use an approximately 1800×1400 px landscape canvas with a pale blue-grey background and slightly darker cool-blue water. Sketch an oval body, rounded head and short bill pointing left, with a slightly raised tail on the right. Mark a faint horizontal water-level guide through the lower body, not the head or neck. Separate the complete duck form, foreground water, ripples and reflection, drawing the whole shape below the surface initially so its later overlap can be checked. Reduce the image to assess balance and tail position. If head and body resemble unrelated balls, connect the neck before considering the waterline; water must not hide every form problem.

Model the complete duck before submerging it

Model the yellow body with broad upper-left light and slightly darker lower-right values, sharing that light direction with the head. Use orange for the bill and one small dark eye rather than a second large eye also facing the viewer. Suggest the wing with a shallow arc instead of a separate thick block attached to the side. Hide water and check the continuous lower-body curve and a tail growing from the body rather than an added triangle. Keep the toy surface simple with restrained highlights; dense feather texture would change rubber into bird plumage. For now, retain the same base colour below water and adjust it later through overlap and water colour.

Wrap the waterline instead of cutting straight through

Replace the straight guide with a shallow curve around the lower body. Show the front boundary, hide the rear behind the duck and reconnect both ends to the water at the silhouette. Do not run a perfectly horizontal blue stroke across the exposed yellow front as if slicing the body. On the complete-form sketch, mark the front arc and hidden rear arc to check one plausible section, then retain only visible portions in the final. If the left and right contact heights differ strongly, decide whether a deliberate tilt explains them; otherwise align their level. Small undulations are acceptable, but the overall boundary still belongs to one water surface.

Occlude the belly without destroying its contour

Let foreground water cover the lower belly while retaining the original complete duck. To suggest a little submerged volume, leave a blurred, cooler, low-contrast yellow-green shape, without outlining every underwater detail more clearly than those above. Showing no underwater body is also valid if the boundary works; do not mix incompatible states. Hide foreground water to confirm the original contour has not been accidentally erased, then restore it to inspect the exposed amount. If the duck appears seated on a solid blue platform, soften the overly hard water boundary and extend contact ripples around the body instead of giving the water a thick side wall.

Separate the contact accent from ripples

Add a short, low-contrast cool dark accent along part of the front contact arc, keeping the darkest area local rather than circling the whole body in black. Outside it, draw two or three flattened ripple arcs, closer near the duck and more spread out farther away, with gaps. Keep them out of the body and do not aim them all at an unrelated vanishing point. Hide the reflection and check whether contact already reads. If the duck looks like a sticker, inspect whether ripples disappear behind it and reappear in front. If it sits in a black pit, weaken the continuous dark ring: water contact is not an equally wide black outline.

Align the reflection before breaking it up

Paint a low-contrast yellow-grey reflection directly below the duck, first matching the horizontal positions of head, bill and body, then breaking it with short horizontal strokes. Keep it somewhat clearer nearby and looser farther away. A left-pointing bill must remain on the left in the reflection, not move right for symmetry. Begin the reflection below the water contact without an unexplained large gap, and avoid making it another duck. If crowded, retain only the main body-colour band rather than inverting every facial detail. These are hand-painted reflection cues that may be simplified for the chosen water state, but their positions must not contradict one another.

Compare shallow and deeper immersion

In a separate copy, raise the waterline slightly to expose less belly while retaining the original head, bill and tail shapes. Adjust the contact arc and reflection origin accordingly. Do not merely lift a blue line while leaving a clearly exposed belly below it. Compare which version shows more body, ensuring the difference comes from water occlusion rather than shrinking the duck. This is a visible-state study, not a test of real load or floating stability. If the tail becomes inexplicably detached, inspect the waterline against its root and return to the complete-form layer if necessary rather than adding splashes to conceal the problem.

Inspect contact points after export

Save the layered original and inspect the exported PNG at the intended size, focusing on left and right water contacts, front arc and reflected bill. If the waterline merges with body shading into a thick black band, weaken the contact accent or adjust water colour rather than indiscriminately brightening the entire duck. If distant ripples compete, reduce their length and contrast so the toy remains dominant. Keep a reflection-free structural reference; a future version can change only water colour and recheck the contacts. Record a definite error, such as a higher right contact without a pose explaining it, rather than attributing every problem vaguely to unconvincing water.

Related tutorials and sources

Paint underwater koi in Aquarell: separate body, markings and surface; Paint a lake reflection in Aquarell: preserve alignment, then break the detail.

Sources checked on 5 November 2026: the official Aquarell App Store listing and Apple Lookup show version 1.0.7, requiring iOS / iPadOS 15.0 or later. The drawing uses the publicly described brush, colour, layer and saving capabilities manually. Sizes, shapes and colours are practice suggestions; confirm controls against the installed version. Keep the native artwork for further editing and use PNG for previews. This batch does not claim step-by-step device testing.