general:interface_navigation:brush_components:stroke

3DCoat’s Brushes can be applied with an ordinary mouse, or with the enhanced behavior of a graphic tablet.
The Stroke panel, as you might imagine, specifies the way that your stroke behaves from mouse click to mouse release.
Several Stroke modes exist in the Stroke Panel to help control the application of Brush strokes, as well as an extensive array of spline and polygon based drawing modes.

When not sculpting, these tools work in 2D to define regions and “masks” or “frozen” areas (and relief in the Paint Room).
Some sculpting tools use the shapes you draw as a means to clone, cut, or perform some form of boolean function.

Let’s examine all the functions present in the Stroke Panel, starting from left to right, top to bottom:

Point the cursor onto “Stroke Mode” menu or press E-key to see 20 drawing modes available. The first six modes (marked with yellow rectangle) are Stroke Modes and are used with graphic tablets. Most of them are self-explanatory:

Border width: At higher values this setting creates a kind of extruded Brush Falloff. A square shape -for example- becomes a curved pyramid, a Circle becomes a curved and tapering cylinder.
Depth Limit: Defines that depth that controls all effects.
Ignore back faces: Allows the selected tool to work only on visible surfaces.With this option enabled then back or invisible faces will not be changed during the painting with rectangle, contour and ellipse.

Settings: There you may define modifier key for square and round selection modes.
Load shape: Loads a predefined Curve shape from a file. Accepts Adobe Illustrator files. The imported curve is converted to a 3DCoat spline, which you can manipulate in the standard ways.
Save shape: Save curve shape from file. Raster, Vector and custom 3DCoat presets can be saved.

These first five icons are the standard Brush modes and can be best understood by trying them out, one by one. These modes all require a pressure sensitive tablet and stylus for them to function exactly as described.
A description of each mode appears when you hover your mouse over each icon (as is the case with all 3DCoat tools and functions called “hints”).

Radius & Depth Pressure: Stylus pressure affects radius and depth.
Depth & Opacity Pressure: Stylus pressure only affects draw depth.
Radius, Depth & Opacity Pressure: Stylus pressure modifies radius, depth, and opacity.
Droplet Pressure: Increasing pressure decreases radius and increases depth and opacity.
Constant Pressure: Draw with constant depth and radius, regardless of Stylus pressure.
Dotted Stroke: Apply the current Brush with discreet dots. Dot spacing depends on the speed of your stroke.


The next modes are drawing with lines and curves:

Vertex Lines: Creates perfectly straight lines. Click to place a vertex, repeat to place more than one. Click starting vertex to make a closed shape. Press ESC to start a new line.
Vertex Curves: Creates interpolated curves. Click to place a vertex, repeat to place more than one. Click starting vertex to make a closed shape. Press ESC to start a new line.
Curve Stroke: In this mode you may draw very accurate and controllable strokes defined by splines. Click to add points to spline. Each point has own radius.
Press ESC to end spline chunk. Click again to start new chunk. Press RMB over points to change point sharpness or smoothing. Click LMB to assign new radius to the point. If you click on the first or last point of the chunk you may expand the chunk. You may split curves and drag points via LMB. Use DEL key to delete points. Pay attention to the small square over the spline, you will find different options there and define pressure flow. Press ENTER or double-click to draw stroke. Pay attention that brush radius is shown only for points attached to the surface.


Stamp Mode: Uses your selected Brush Alpha to add an impression or depression, mask or frozen area, based on this Alpha, at the location you Left-Click the mouse. Left-Click dragging the mouse resizes and rotates the Stamp. LMB Click and drag to vary size. Center is origin of your click. Release to place.
Stamp Drag Mode: Works similarly to the ordinary Stamp mode but, when you Left-Drag with the mouse, you can slide your Brush image (Alpha) along the surface of the model. LMB Click and drag your brush, release to place. Dependent on brush size.


Square Lasso: Paint with a square. After activated press SPACE bar to enter square size manually. Based on your starting and ending points of the defined Square (or trapezoid), 3DCoat extrudes or indents a cubic or trapezoidal solid shape based on the Depth setting of the Brush. (Best to use Orthographic views with this Brush).
Higher Voxel resolutions allow for sharper and cleaner shapes.
Rectangle Lasso: Paint with a rectangle. This mode works with almost every tool. You can paint, freeze, fill, or make planes with the rectangle. Use modifier key to make it square (it is ‘Q’ by default).
Same as the Square tool, but allows for long rectangular and long trapezoidal solid extrusions, indentations and masks. Higher Voxel resolutions allow for sharper and cleaner shapes.
Vertex Lasso: Paint by surrounding an irregular area. Click to add vertices to the curve. Double click, or press on the starting vertex to finalize contour. Press ESC to cancel the contour, BKSP to delete the last vertex. This mode works with almost every tool. You can paint, freeze, fill, or make planes with contour.
Based on the 2D polygonal shape that you draw, 3DCoat extrudes or indents, masks or freezes an area along the surface normal of the object. Hover Brush Cursor over the first point in the series until you see a small green circle, then hit “Enter” to confirm the shape. Higher Voxel resolutions allow for sharper and cleaner shapes.
Stroke Lasso: Paint with drawn contour. Draw by holding the LMB, release to apply. This mode works with almost every tool. You can paint, freeze, fill, make plane with contour.
Use your mouse to draw a freeform shape and hover the Brush Cursor over the first drawn point until the small green circle appears, press “Enter” to confirm the shape. 3DCoat extrudes or indents, masks or freezes an area along the surface normal of your object based on the Depth setting of the Brush. Higher Voxel resolutions allow for sharper and cleaner shapes.
Circle Lasso: After activated press SPACE bar to enter square size manually. Draws a perfect circle from the center to the edge of the circle and extrudes or indents, masks or freezes a circular shape along the normal of the object, based on the Depth setting of the Brush.
Ellipse Lasso: Paint with an ellipse. Use modifier key to make it exactly round (it is ‘Q’ by default).
Same as the Circle tool, except the shape extruded is based on the Ellipse that is drawn.
Closed Spline: Extrudes or indents, masks or freezes an area as a closed regular spline or B-spline shape, close the shape by pressing the “Esc” key to stop adding points. Right-click over any point to change from smooth interpolation or angular. You can Load and Save your defined shapes. Hover the mouse over any command to see the Hint.
Press DEL key to delete point. Click to insert point in the middle. Double click or press ENTER to draw the area.
3D Closed Spline: Draw with closed spline over surface in 3D. Usual splines act through projection, this mode works not in projection but in 3D space, it allows to make selection right on the surface. It is mostly applicable in Sculpt Room related tools.
Press ESC to stop adding points. Use RMB to change vertex smoothness/sharpness. Press DEL to delete point. Click to insert point in the middle. Double click or press ENTER to draw the area. Use control panel on the top right to edit spline.
Single Polygon: One click will paint a single polygon, while holding down the LMB will paint up to the borders of all “source” polygons.


Near the control poins you will see the drop-down arrow that accompanies the drawn spline. Press it and you'll be able to choose different options from an extensive menu of commands:

Apply: Apply spline action. You may use ENTER instead. With CTRL pressed it will counter act.
Clear: Clear all control points.
Detach from surface: This command detaches any control point that is being attached to a surface (a control point becomes attached if you add it while the cursor is over the surface).
Attach to the Surface: Attach points to the surface so that spline will rotate together with the model
Add points: Use this command if you pressed ESC after adding control points and then you decided to continue. Press ESC to finish.
Edit points: This is a default mode after you've finished with adding control points. Hover over a spline in the place where you want to add another control point (when you see red point press LMB to add it). Drag any control point with LMB. Use RMB over any control point to toggle vertex sharpness.
Transform all: Transform the whole spline with the manipulator (rotate, move, scale vertically, horizontally, proportionally).

B-Splines: (highlighted). Use B-Splines by default. In this mode spline will be smoother and will not path through the control points. Use it with vertex sharpness to get various forms.
Hide Helper Lines: Hide grey lines that are connecting control points.

Edit points table: Set numerical values of each control point. In this window you can also set the type of each control point: sharp (makes sharp corner at this point), B-spline (simple spline if unchecked).

Scale: Set the scale factor and press “OK” button or ENTER.
Rotate: Set the angle of rotation and press “OK” button or ENTER.
Flip horizontally: Flip the whole spline horizontally.
Flip vertically: Flip the whole spline vertically.
Save…: Save spline to a file.
Load…: Load previously saved spline from a file.
Allows you to save and load curve profiles. This is a very powerful feature, as you can import EPS files, among other file types, with vector graphics to use as part of a Brush, in the Paint or Sculpt Rooms. You can also save your curve profiles made in 3DCoat, and reload them later, or share them with others.
- The support files for saving are:
EPS, Spline (3D-Coat proprietary file)

- The supported files for loading are:
EPS, Spline (3D-Coat proprietary file), TGA, BMP, PNG, JPG, DDS, TIF/TIFF, EXR, HDR.


Apply Brush “Dabs” with Spacing: This causes the current Brush to especially respond to the “Dabs, Jitter and Spacing” options found in the “Brush Options” Panel. Experimentation demonstrates this action best.


3D Stroke Mode w/ the Pose Tool: This video is a quick demonstration of the new ability to use the 3D Stroke Draw Mode with the Pose Tool.

Applying a Decal or Image: This video demonstrates 3 methods and toolsets for applying a decal/logo or any image to your model.

  • general/interface_navigation/brush_components/stroke.txt
  • Last modified: 2019/10/13 23:14
  • by carlosan