prosepainter.com

ProsePainter 2 builds a custom AI brush by mixing style ingredients on a slider interface: you combine any number of ingredients, optionally add a text prompt, and save the result as a reusable brush. The same brush can also be derived from reference images instead of sliders. This explainer covers both routes, how to steer results with prompts and AI strength, and where ControlNet guides fit in.

The Two Ways to Build a Brush

ProsePainter 2 presents style creation as two complementary paths, both listed on its landing page.

Path 1: Style ingredients with sliders

The site describes an "intuitive style slider interface" where you "mix and match different style ingredients to craft the perfect brush." The stated capabilities are:

• Combine any number of style ingredients
• Add custom prompts for more control
• Save and share your favorite combinations

The mechanism to understand: each ingredient contributes a direction to the style, and the slider sets how strongly that ingredient pulls on the output. Adding an ingredient introduces a new axis; moving its slider changes the blend. Because the site says "any number of" ingredients, the brush is not limited to a fixed pair — you can stack several and tune each one.

Path 2: Style by image reference

Instead of sliders, you can use images as the style source to "create brushes that capture the essence of a particular medium or aesthetic." The listed capabilities:

• Mix several images to create hybrid styles
• Capture a section of your work-in-progress to lock in a style
• Build a library of favorite styles

The third point is the practical bridge between the two paths: a brush made either way can be stored and reused, so your style library becomes the working set you paint from.

A Concrete Example

Suppose you want a brush that reads as ink wash with a faint pencil underdrawing.

1. Start with ingredients. Add an ink-wash ingredient and a pencil ingredient. Push the ink slider high and keep the pencil slider low so the pencil reads as texture rather than line.
2. Add a prompt for control. The site supports custom prompts alongside ingredients; a short prompt describing the medium and mood narrows the result further.
3. Test on a small area. Paint a few strokes, then adjust. If the pencil dominates, lower its slider rather than removing it.
4. Save the combination. Once the brush feels right, save it so it joins your style library.

If you already have a reference — say a photo of a watercolor wash you like — switch to the image-reference path, mix it with a second image if you want a hybrid, and save that brush instead.

Steering the Output: Prompts, AI Strength, and Guides

Style is only one input. ProsePainter 2 lists three further controls under "Fine-Grained Control" and "ControlNet Guides":

The AI strength slider is the one most likely to need revisiting: it is the trade-off between what you painted and what the model adds. Lower it when the AI overpowers your marks; raise it when you want more invention.

Working at Canvas Scale

Two canvas features affect how styles behave in practice:

• Expand and crop seamlessly as the artwork evolves, expanding in any direction up to 5k.
• Upscale for added detail.

Style consistency matters more once you expand, since new regions are generated in the context of the existing painting. Locking in a style from a section of your work-in-progress — one of the image-reference capabilities — is a way to keep that consistency as the canvas grows.

Exploration Aids

For breaking out of a rut, the site lists randomize your styles for fresh ideas and a range of mirroring options to jumpstart compositions. Randomizing is a fast way to discover ingredient combinations you would not have set deliberately; mirroring helps when you want symmetry without painting both halves.

Deciding Which Route to Use

• Use sliders and ingredients when you can describe the style you want but have no single image that captures it, or when you want repeatable, tunable control.
• Use image reference when you have a visual target — a medium, an aesthetic, or a section of your own painting — and want the brush to capture its essence.
• Mix both when a reference gets you close and a prompt or slider adjustment finishes the job.

The site's framing — "Paint - don't prompt" — signals the intended workflow: prompts and sliders shape the brush, but the painting itself is done by hand.

ProsePainter 2 is a browser-based digital painting tool built around an AI-assisted canvas. Instead of generating images purely by typing prompts, you paint on the canvas and use AI features—style sliders, image references, text prompts, and ControlNet guides—to shape what appears. It suits artists who want to explore AI imagery through direct painting rather than prompt-only workflows.

How It Differs from Prompt-Only AI Art

The core idea is stated plainly on the site: "Paint - don't prompt." Your brushwork and canvas input remain part of the process, and the AI acts as an assistive layer. You control how much the AI contributes by adjusting AI strength, balancing your own input against the model's creativity.

Main Features

Style Controls

• Style slider interface: Build unique styles in seconds by mixing and matching "style ingredients" to craft a brush.
• Custom prompts: Add text prompts on top of style choices for finer control.
• Saved combinations: Save and share favorite style setups.

Style by Image Reference

• Use one or more images as a style reference to capture a medium or aesthetic.
• Mix several images to create hybrid styles.
• Capture a section of your work-in-progress to lock in a style.
• Build a library of favorite styles.

Fine-Grained Control

• Text prompts guide the AI during generation.
• AI strength is adjustable, so you decide how much the output leans on your input versus the model.

ControlNet Guides

Advanced guides such as edge and depth maps steer generations with more precision—useful when composition matters and you want structure preserved.

Canvas Growth

• Expand the canvas in any direction up to 5k.
• Crop seamlessly as the artwork evolves.
• Upscale artwork for added detail.

Exploration Aids

• Randomize styles to surface fresh ideas.
• Mirroring options to jumpstart compositions.

Who It Fits

If your goal is fully automated image generation from text alone, a prompt-first tool may be more direct. ProsePainter 2 assumes you want to be hands-on.

Getting Started

The site offers a "Launch App" entry point to start painting. The workflow it describes is: choose or build a style (via sliders, prompts, or image references), paint on the canvas, adjust AI strength and guides as needed, then expand, crop, or upscale as the piece develops. No pricing or login requirements are stated in the available site information, so check the app itself for access terms.

ProsePainter 2 treats the canvas as something that grows with the work rather than a fixed frame you must plan around. You can expand the canvas in any direction up to 5k and upscale your artwork for added detail, and the site describes both expanding and cropping as seamless as the piece evolves. The practical condition is that this is a workflow inside the app itself: you launch ProsePainter, work on the canvas, and use the grow-as-you-go controls as the composition changes. The site does not publish step-by-step menu instructions, so the guidance below describes the actions and what to expect rather than exact button locations.

What "grow as you go" means in practice

Most painting tools ask you to choose a canvas size before you start, which forces you to guess how much room a composition needs. ProsePainter 2 inverts that: the canvas is meant to be extended when the artwork demands it, and cropped back when it doesn't. The site frames this as "Expand and crop seamlessly as your artwork evolves."

That changes how you plan a session. Instead of deciding up front whether you need a wide landscape or a tall portrait format, you can begin with a comfortable working area, develop the focal point, and then add space in the direction the composition pulls. A figure that started centered can gain room above for a sky, or to the side for a second subject, without restarting.

Expanding the canvas

• Input: an in-progress artwork on the ProsePainter canvas, plus a decision about which direction needs more room.
• Action: use the canvas expansion control to add space in any direction. The site states expansion is possible in any direction up to 5k.
• Expected result: new empty canvas area adjacent to your existing work, with the original artwork preserved in place. Because the site describes expansion as seamless, the intent is that you continue painting across the new boundary rather than managing a separate document.

The 5k figure is the documented ceiling on expansion, so treat it as the outer bound of the canvas rather than a per-expansion limit. If you are building a large piece, expand in stages and keep painting between expansions so you can judge whether the added space is actually helping the composition.

Cropping back

Cropping is the counterpart to expansion and is described as seamless in the same sentence. The useful habit is to crop after an expansion experiment: if the extra space above a horizon line turns out to be dead air, remove it rather than filling it. This keeps the canvas matched to the artwork instead of the other way around.

Upscaling for detail

Upscaling is listed separately from expansion and is described as adding detail to your artwork. The distinction matters:

A sensible order is to settle the composition first — expand and crop until the framing is right — and upscale once you are no longer moving the boundaries. Upscaling before the composition is final risks spending detail work on areas you later crop away.

Where this fits with the rest of the tool

Expansion and upscaling are not isolated features; they interact with the AI-assisted painting controls the site describes.

• Style brushes and style ingredients determine the look of what you paint into newly expanded areas. If you expand a canvas after establishing a style, keep using the same brush combination so the new region matches. The site notes you can save and share favorite combinations, which helps when a piece spans multiple sessions.
• Style by image reference lets you capture a section of your work-in-progress to lock in a style. This is directly useful after an expansion: sample the existing artwork so the new area inherits its look rather than starting from a default.
• Text prompts and AI strength apply to generations in the expanded region as they do elsewhere. Adjusting AI strength balances your own input against the AI's contribution, which matters at a seam between hand-painted and generated areas.
• ControlNet guides such as edge and depth maps can steer generations in new canvas space so that structures like horizons or architectural lines continue across the boundary.

A worked example

Suppose you are painting a coastal scene and the shoreline sits too close to the bottom edge.

1. Expand the canvas downward, within the 5k limit, to open space for foreground water and rocks.
2. Continue painting into the new area using the same style brush, or sample a section of the existing water with the image-reference style tool so the new region matches.
3. If a generation in the new space drifts from the established perspective, apply an edge or depth guide to keep the shoreline consistent.
4. Crop any excess if the added space proves larger than needed.
5. Once the framing is settled, upscale the finished piece for added detail.

Common sticking points

• Expanding too late. If you have already upscaled, expanding afterward means the new area starts at a different level of detail. Settle the frame before upscaling.
• Style drift at the seam. New canvas area is empty, so the first strokes there set the tone. Reuse a saved style combination or an image reference from the existing work rather than improvising.
• Treating 5k as a target. It is a maximum, not a goal. Expand only as far as the composition needs.
• Forgetting crop. Expansion is easy to overuse. Review the frame after each expansion and remove space that isn't earning its place.

The site's own framing — "Grow as You Go" and "Optimized for Exploration" — suggests the intended rhythm is iterative: expand, paint, crop, repeat, and upscale when the piece is resolved. The app is launched from the site's "Start painting with ProsePainter today" entry point; the site does not state pricing or login requirements for the app, so check those at launch.

ProsePainter 2 offers four exploration features aimed at getting past a blank canvas: style randomization, mirroring options, capturing a section of a work-in-progress to lock in a style, and building a personal library of favorite styles. All four are described on the product's site as part of its "Optimized for Exploration" and style-building toolset. They work best as starting moves — generating raw material and variations — before you refine with prompts, AI strength, and ControlNet guides.

Style Randomization for Fresh Ideas

The site lists "Randomize your styles for fresh ideas" as an exploration feature. In practice, this means the style slider interface can be shuffled rather than dialed in by hand, producing unexpected combinations of style ingredients.

• When to use it: You have no direction yet, or your usual style choices feel stale.
• What you get: A starting point you wouldn't have chosen deliberately — useful for breaking a creative block.
• What to do next: Once a randomized result catches your eye, save it (see the style library below) so you can return to it, then refine with custom prompts and AI strength.

Because the site does not detail how many styles are in the randomization pool or whether randomization respects currently selected ingredients, treat the first result as a sketch, not a finished direction.

Mirroring Options to Jumpstart Compositions

ProsePainter 2 includes "a range of mirroring options to jumpstart your compositions." Mirroring is a composition shortcut: instead of building symmetry or balanced layouts stroke by stroke, you let the tool reflect your marks.

• When to use it: You want a structured composition fast — symmetrical figures, decorative patterns, or balanced abstract layouts.
• How to approach it: Paint one side or quadrant, apply a mirroring option, and evaluate the result. The site does not specify which axes (horizontal, vertical, radial) are available, so check the app's mirroring controls directly.
• What to do next: Use the mirrored result as a base and break the symmetry selectively with free painting or guided generations.

Capturing a Section of Work-in-Progress to Lock In a Style

This is the most distinctive exploration feature described: you can "capture a section of your work-in-progress to lock in a style." Rather than describing a look in words, you sample it from your own canvas.

• When to use it: A passage of your painting — a color mix, texture, or handling of light — looks right, and you want to keep painting in that vein.
• How it works: Select a section of the current artwork and use it as an image style reference. The site also supports mixing several images to create hybrid styles, so captured sections can be combined.
• Why it matters for starting out: It lets an accidental early mark become the seed of a whole piece's style, which is often how exploration actually unfolds.

Building a Personal Library of Favorite Styles

The site lists "Build a library of favorite styles" and "Save and share your favorite combinations" as capabilities. A style library turns one-off experiments into reusable starting points.

• What to save: Randomized combinations that worked, styles built from captured canvas sections, and hybrid styles made from mixed reference images.
• Why it helps with creative block: You start each session from proven directions instead of rebuilding a look from scratch.
• Sharing: The site states combinations can be shared, so saved styles can also serve as a personal catalog you return to or exchange.

How These Features Fit Together

A practical loop: randomize or mirror to generate a first composition, capture any section that looks promising, save it to your library, then refine with text prompts, AI strength adjustment, and ControlNet guides (edge and depth maps) for precision. The site also notes you can expand the canvas in any direction up to 5k and upscale for added detail, so an exploratory sketch can grow into a larger piece.

What the Site Doesn't Specify

The product page does not state pricing, account requirements, or platform availability, so check the app itself before relying on any of these features in a paid or collaborative workflow. It also doesn't detail mirroring axes or randomization scope — the fastest way to learn the boundaries is to open the app and try each feature once on a small test canvas.

Fine-grained control in ProsePainter 2 comes from three layers working together: text prompts that describe what the AI should add, an AI strength setting that decides how much the AI overrides your own brushwork, and ControlNet guides (edge and depth maps) that constrain the shape and structure of what gets generated. The practical goal is artist-directed output — you paint, and the AI fills in around your decisions rather than replacing them.

The three control layers

Text prompts: direction, not command

ProsePainter 2 is framed as "Paint — don't prompt," but text prompts still exist as a steering tool. According to the site, you use prompts "to guide the AI in your generations." The distinction matters: a prompt here is one input among several, layered on top of what you've already painted, rather than the sole source of the image.

Prompts can also be attached to style ingredients, letting you add "custom prompts for more control" when building a brush. That means the same prompt logic applies at two levels — the overall generation and the individual style component.

AI strength: the balance dial

The AI strength setting is the core of fine-grained control. The site describes it as adjusting "the balance between your input and AI creativity."

• Lower strength keeps more of your original strokes and lets the AI make smaller, more conservative additions.
• Higher strength gives the AI more room to reinterpret and invent.

This is the setting to reach for first when results feel either too timid or too disruptive. If the AI is smothering your composition, reduce strength; if it's barely responding to your prompt, raise it.

ControlNet guides: structural constraints

Edge and depth maps are the most precise lever. The site lists "advanced guides like edge and depth maps to steer your generations with precision."

• Edge maps lock in outlines and contours — useful when you want the AI to respect the boundaries of a drawn shape.
• Depth maps encode near/far relationships — useful when you want generated detail to follow the spatial logic of your scene.

These guides constrain where and how the AI applies its creativity, which is different from the strength dial, which controls how much.

How the layers combine

A useful way to think about it: prompts say what, strength says how much, and guides say where.

For example, if you've sketched a figure and want the AI to render fabric texture without redrawing the silhouette, you'd set an edge map from your sketch, write a prompt describing the fabric, and keep AI strength moderate so the texture fills in without the model reinterpreting the pose.

Style controls as a fourth input

Style ingredients and image-reference brushes also feed into the generation, and they interact with the controls above. The site notes you can "mix several images to create hybrid styles" or "capture a section of your work-in-progress to lock in a style." A style built from your own work-in-progress is effectively another way of keeping the AI consistent with your existing direction — complementary to a lower AI strength setting.

Practical starting sequence

1. Paint the composition you want to keep.
2. Add a text prompt describing the detail or content the AI should contribute.
3. Set AI strength conservatively, then increase only if the AI under-delivers.
4. If structure drifts, add an edge or depth guide rather than pushing strength higher.
5. Refine style ingredients last, since they shift the overall look across the whole canvas.

The site's own framing — "optimized for exploration," with style randomization and mirroring options — suggests these controls are meant to be adjusted iteratively rather than set once. Treat strength and guides as the two dials you return to most often when a generation misses.