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Basics Of Line Rendering

We explain how to use Pencil+ 4 Line to draw lines over objects.

Create Objects

Create objects where the Lines will be drawn. For this we will create Monkey from Mesh. To cleanly output the Lines, we added [Subdivision Surface] from [Modifier Properties] to the object and set [Shade Smooth].

Editor Type Selection Window

Pencil+ 4 Line Node Tree Settings

  1. Add a window and set the [Editor Type] to [Pencil+ 4 Line].

    Editor Type Selection Window

  2. The "Pencil+ 4 Line" panel is displayed in the editor. There are no Line settings in the initial state so select [Add] under [Line List].

    Pencil+ 4 Line Panel

  3. Add a [Line Set]. Click [Add] under the [Line Sets] list. A [Line Set] is added.

    Pencil+ 4 Line Panel

  4. Add objects to the Line Set. Click [Add] under the [Objects] list to display the [Add Objects] dialog. Select the object Suzanne from the list and click [OK].

    Pencil+ 4 Line Parameters

Compositor Settings

A Pencil+ 4 Line ViewLayer is necessary in the compositor to render the Lines.

  1. Enable the compositor's [Use Nodes].

    Use Nodes

  2. Select [Add] - [Pencil+ 4] - [ViewLayer] from the compositor editor's menu. A Pencil+ 4 Line ViewLayer is created.


  3. Select [Add] - [Color] - [Alpha Over] to add a [Alpha Over] node. Connect the [Render Layers]'s [Image] socket to the top [Image] socket on the [Alpha Over] node. Then connect the [Alpha Over] node's [Image] socket to the [Composite]'s [Image] socket. Finally, connect the Pencil+ 4 Line [ViewLayer] node's [Image] socket to the bottom [Image] socket on the [Alpha Over] node.

    Alpha Over


Click [Render Image] from [Render] in the Blender menu. Pencil+ 4 Lines are rendered in the Blender Render window. Freely adjust the Line color and thickness using the Brush area in the Line Set hierarchy. Here we set the size to 6px.

Rendering Result