SOS Artista is a drawing grid app designed for painters who work from reference images and want to transfer them accurately to canvas.

Add a customizable drawing grid to a reference photo, calculate the exact grid measurements for your canvas, create square cells automatically, and use visual analysis tools to study values and tonal contrast before painting.

The idea is simple: prepare and analyze the reference in the app, then have the information you need when you move away from the screen and start drawing or painting on the canvas.

DRAW A GRID AND TRANSFER IT TO YOUR CANVAS

The grid method is a classic way to transfer a photo, sketch, or reference image while maintaining proportions.

SOS Artista helps with this process by calculating where the grid lines should be drawn on the canvas.

Configure the drawing grid, enter the canvas dimensions, and the app calculates the corresponding measurements.

This is especially useful when:

• the reference image and canvas have different proportions;
• you are comparing different canvas sizes;
• you want accurate measurements without calculating every line by hand;
• you need a square grid with equal-width cells.

You can save, share, or print the measurement sheets and keep them nearby while you work.

CREATE SQUARE GRID CELLS AUTOMATICALLY

If you prefer working with square cells, SOS Artista can calculate and create a square grid automatically.

This makes it easier to prepare a regular drawing grid without manually adjusting rows and columns.

CUSTOMIZE YOUR GRID AND COMPOSITION GUIDES

Adjust line color, thickness, and opacity to make the grid easier to use with different reference images.

You can also use composition guides such as diagonals, the rule of thirds, or a center cross, and add grid numbering whenever you need it.

ANALYZE YOUR REFERENCE IMAGE

A reference image contains more than outlines and proportions. Values, light and dark areas, and tonal relationships also matter.

SOS Artista includes different views to help you study the image before painting:

• grayscale;
• posterized grayscale;
• tonal contrast map.

These tools can help simplify complex references, separate major light and shadow shapes, and make value relationships easier to see.

WORK WITH DETAILS AND CROPPED SECTIONS

Zoom in, crop, and save cropped sections with different proportions to study details. This is useful for faces, hands, architectural details, small objects, and parts of larger compositions.

ORGANIZE YOUR REFERENCE AND DETAILS AS A PROJECT

Each project starts with one main reference image, but you can crop and enlarge details and save them as additional images within the same project.

Each image or crop can have its own drawing grid and one or more measurement sheets. For example, if you know that a detail will occupy 20 × 20 cm on your canvas, you can grid that crop separately and calculate the exact measurements for drawing its lines.

You can also add notes to the project and to individual images, and export measurement sheets for separate reference while you work.

This keeps the main reference, important details, grids, proportions, measurements, and notes together in one project.

WORK OFFLINE AND KEEP YOUR REFERENCES PRIVATE

SOS Artista works offline and processes your images on your device.

You do not need to create an account or upload your reference images to the cloud to use the app's tools.

Ideal for:

• oil and acrylic painting on canvas;
• watercolor and mixed media;
• pencil and charcoal drawing;
• artists using the grid method;
• anyone who wants to scale a reference image accurately to a real canvas;
• painters who want to study values and composition before they start painting.

Prepare the reference, calculate the measurements, study the values, and take the information you need back to the canvas so you can continue working away from the screen.

If you have questions, comments, or suggestions for improving SOS Artista, contact us at legal@sos-artista.com.

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