Pixel Art Studio v1.3.0：一键UV工具、图案、新绘画工具与改进

Pixel Art Studio 1.3 is out! The highlight of this version is completely rewritten UV unwrapping algorithms and a new set of UV tools, for 1-click UV unwrapping for texture painting. You can now also assign and test different texel densities (pixel sizes) to selected faces on the fly, even while you are still editing the mesh, so you don't ever have to manually position and scale UV islands again.

Also:

• Fill patterns, custom patterns, color jitter and noise added to all tools.
• Spray can tool.
• Shading tool (lighten and darken colors, as well perform hue shifting).
• Integration with Godot, Unity and Unreal Engine to auto-export models and textures painted with Pixel Art Studio, on save, automatically.
• Tiled mode in the image editor.
• Tool icon and color picker colors at mouse position.

Many improvements and bug fixes across the board! See the complete changelog below.

v1.3.0 Changelog

• New feature: UV unwrapping completely rewritten and improved. Multiple new UV tools and new options to "Pixel Art Unwrap".
  • New UV Tools section in the UV panel. Pixel Art Unwrap options are now in their own Unwrap Options section.
  • Stack UVs: stacks the selected faces on the same UV spot, so they paint the same pixels (ex: the 8 sides of a cylinder painted only once). The last selected face is the source, and Match Size also resizes the other faces to the source's size. Click the X button to unshare.
  • Keep UVs Together (Join): neighbouring faces stay connected as one UV island when running Pixel Art Unwrap (to preserve the shape of the mesh, like a character's face or a vehicle's front), instead of each face becoming its own island. Click the X button to release them.
  • Select Linked UV Faces: selects every face that is stacked or joined with the selected faces.
  • Flip Islands H and Flip Islands V: flips UV islands in place.
  • Quick Unwrap Model: unwraps the whole model from any mode (Object, Edit, Sculpt, Paint) and goes back to the mode and selection you had, so you don't have to manually go to Edit Mode > select all faces > Unwrap > and back again to where you were at.
  • New Stacked Faces and Joined Faces (UVs Together) lists: every group gets a name and a color, and can be selected and removed from the list. Selecting a face in Edit Mode also selects its group in the list, and the group is highlighted in the 3D Viewport and in the UV Editor.
  • Each joined group can choose how Pixel Art Unwrap unwraps it: Relax, Keep Aspect (keeps the proportions of the current UVs) or Keep Shape (keeps the island exactly as drawn, only scaled to the texel density). A group can also be a single face, to keep the shape or aspect of just that face.
  • Pixel Art Unwrap now lays each face flat in its own plane, keeping its exact shape and pixel density.
  • Several meshes that use the same texture are unwrapped together as one layout (ex: a character made of separate head, body, arms and legs objects): one pixel density for all of them, and no UV islands on top of each other. Works with Pixel Art Unwrap (select the meshes and go to Edit Mode) and with Quick Unwrap Model. From Object Mode, Quick Unwrap Model takes the selected meshes that use the active mesh's texture, and its report says which selected meshes it left out. Grow Texture to Fit grows the texture to fit the whole group.
  • New Unwrap Options:
    • Margin (px): whole pixels between islands.
    • Avoid Shearing and Diagonal Pixels: faces keep their exact shape and pixel density. When turned off, every corner goes onto a pixel corner, there are no partial pixels, but faces that are not rectangles bend a little.
    • Snap Corners Within: faces that are already almost on the pixel grid are snapped onto it, and the others keep their exact shape.
    • Keep Pinned UVs: pinned UVs stay where they are, other faces are packed around them.
    • Keep Density Zones: each face is scaled by the density of its zone, instead of one density for the whole model.
    • Keep Pixel Aspect: each face keeps the pixel aspect measured for its zone, the unwrap keeps the proportions of the original UVs.
    • Joined Faces Layout: Unfold (every face keeps its exact shape), Relax (one piece, for curved surfaces), Project (seen from one direction) or Auto (unfolds when the faces can lie flat, relaxes when they are curved).
• New feature: New Density Zones tools and algorithms. Management UI and tools revamped.
  • Density zones now also have a pixel aspect (pixels taller than they are wide, or the other way around, which is common in PS1 models). Detect Density Zones measures it and splits a zone when its islands have different aspects (very thin islands, under 4 pixels, are ignored for the aspect).
  • Measure Aspect: measures the aspect of existing zones and keeps their names and densities (useful for zones made or renamed by hand).
  • Each zone's Pixel Aspect can be edited below the list.
  • Pixel Art Unwrap respects the zones and their aspect with Keep Density Zones and Keep Pixel Aspect (ex: a character's face now unwraps with the same proportions as the face topology).
  • Apply to Faces: Density Zones is now usable with new models (not only pre-existing models). You can select faces and assign a Density Zone to them while making the model, on the fly. Gives the selected faces the zone picked in the list and scales their UV islands to its density, it's how you can assign different pixel sizes for the same model.
  • Clear Zones now asks for confirmation before clearing.
  • The canvas setup wizard also has Keep Density Zones, and the texture size it suggests takes the zones into account.
• New feature: Fill Patterns and Dithering Patterns for all drawing tools (including brush, shapes, eraser, bucket fill, etc), inspired by Graphics Gale. The patterns can be filled with 2 colors or with primary color + transparency.
• New feature: Custom pattern management.
• New feature: Noise fill pattern, to paint random pixel noise (example: the body of a PS1 bottle or a dirt wall). It works with every tool that supports patterns, with 2 colors or with primary color + transparency.
  • Density: how many pixels take the primary color.
  • Clump: 1 scatters single pixels, higher values gather them into patches or islands and valleys.
  • Seed: a different seed gives a different noise. The noise is fixed to the texture's pixels, so painting over the same area again doesn't change it or make it denser, and strokes next to each other meet without a seam.
• New feature: Color Jitter for the Brush and the Bucket Fill, in the Colors and Palettes section. Every pixel gets a variation of the color:
  • Shades: lighter and darker shades of the color being painted (with an optional Hue Shift, where light shades get warmer and dark shades get cooler, same as the Shading brush).
  • Swatches: scatters the selected swatch and the swatches to its right, ex: pick 4 browns from your palette and paint with the 4 of them at once.
  • It also has its own Clump and Seed, and the brush preview shows the varied colors before you paint.
• New feature: New Brushes and Patterns section, with galleries for the brush shapes and the patterns.
• New feature: Show active tool icon at mouse position (tool cursor), so you know which tool is currently active without having to look at the toolbar. The icon follows the brush size radius.
  • The selection cursor shows + or - when SHIFT adds to or ALT removes from a selection.
• New feature: Show color being picked with the eyedropper, at the cursor's position, over the viewport (inspired by Krita).
• New feature: New "Colors and Palettes" section with Blender's color wheel embedded into Pixel Art Studio's panel (it follows Blender's global Color Picker Type preference). The wheel can be hidden in the add-on preferences.
  • New swap button for the two colors (same as the X shortcut).
• New feature: Tiled Mode in the Image Editor (ported from Pixelorama).
• New feature: Shading brush (ported from Pixelorama).
• New feature: Pixel art Spray Can tool.
• New feature: Integration with Godot, Unity and Unreal Engine, a game engine pipeline to easily import and auto-update models and textures painted with Pixel Art Studio into game engines (auto-export when saving in Blender, as well auto create pixel art materials into the game project).
• New feature: Auto-export to GLTF and FBX on save.
• New feature: Every glTF export out of Blender, including a plain File > Export, writes the canvas as unlit pixel art (nearest filtering, alpha cutout). It can be turned off with the Unlit Pixel Art in glTF switch.
• New feature: Brush and line tools bleed (UV dilation) like the paint bucket and gradient tools.
• New feature: The Eraser has the brush's line shortcuts: CTRL+SHIFT erases a straight line from the last stroke, and CTRL+SHIFT+ALT an angled one. It also has its own Bleed setting.
• New feature: Move a selection locked to one axis: hold SHIFT and drag from inside the selection, and it only moves horizontally or vertically. CTRL+SHIFT duplicates it along one axis. The Move tool also moves the layer along one axis with SHIFT.
• Improvement: Pixel Art Unwrap relaxes curved Joined Faces instead of projecting them flat, tilted faces no longer lose pixels.
• Improvement: Much faster painting with Pixel Perfect on low poly models where every face is its own UV island. Long strokes across many small faces no longer get slower the longer you paint.
• Improvement: Increased performance when drawing with brushes bigger than 36px.
• Improvement: Holding SHIFT when using the Line tool and moving the mouse now also draws isometric angled lines (straight, 45 degrees, and the 2:1 / 1:2 isometrics, the quarter turn cut at 18, 36, 54 and 72 degrees).
• Improvement: Holding CTRL+SHIFT+ALT when using the Brush tool and moving the mouse now also draws isometric angled lines (straight, 45 degrees, and the 2:1 / 1:2 isometrics, the quarter turn cut at 18, 36, 54 and 72 degrees).
• Improvement: Disable the Pixel Perfect button and algorithm for bigger brush sizes, as it cause performance issues and the algorithm does not make a difference past a size of 12px.
• Improvement: The gradient tool is mirrored when symmetry is active, in the 3D viewport and in the Image Editor.
• Improvement: Painting in the 3D viewport stays instant over models with many thin faces.
• Bug fix: Brushes that are even sized (2, 4, 6, etc) correctly mirror to the other side when a symmetry tool is active, without leaving a 1px offset anymore.
• Bug fix: When the temporary eyedropper or eyedropper on hold is active, do not show the brush preview alongside the eyedropper.
• Bug fix: When activating the temporary eyedropper or eyedropper on hold shortcut, show them and pick the colors even if the mouse does not move.
• Bug fix: Fixed the brush preview (brush ghosting) for brushes bigger than 3px hovering faces with diagonal UVs.
• Bug fix: Big brushes no longer leak onto faces you cannot see. A stroke close to the edge of a thin or diagonal face used to spill onto a hidden face, into another UV island or into the empty space of the texture. It now paints only the faces it can reach on the surface from where you clicked, and stops where the surface turns away from you (for example under the brim of a hat).
• Bug fix: A big brush stroke at the edge of a face no longer paints a second copy, at an offset, of the part that was cut off at the edge.
• Bug fix: The brush paints the same texels whichever direction the stroke started from, fixes UV and face leaks.
• Bug fix: The brush no longer paints texels that are fully outside the UV of the face under it. To reach the half covered texels along a UV edge, use Bleed 0.5.
• Bug fix: Fixed Curved Path segments that go from the cap of a cylinder over its rim onto the side stay on their points.
• Bug fix: Selections on models with a Mirror modifier: the marquee, lasso and wand select where you drag, the marching ants show on the half you selected, and the selection can now be moved, as well when the UVs run past the texture's edge. The Magic Wand no longer crashes with a face selected in Edit Mode.
• Bug fix: The brush preview shows at every view angle and on faces with flipped normals, and big brushes in perspective are no longer speckled.
• Bug fix: A selection dragged on the model and quickly brought back no longer leaves a ghost (or copy) behind. Also it doesn't lose pixels along the way anymore.
• Bug fix: With a tool active in the UV Editor, G, R and S stay Blender's UV move, rotate and scale.
• Bug fix: Density Zones: Setup Viewport no longer turns red after CTRL+Z, and the pixel grid stays on the zone's density.
• Bug fix: Section headers are readable on the Blender Light theme.
• Bug fix: Activating Pixel Art Studio in a workspace or view do not cause it to create a "zombie" activation onto another workspace or view. Example when you have the UV Editor and 3D Viewport side by side or when you jump between the Layout workspace and another workspace. Fixes https://github.com/PardallTools/pixel-art-studio-docs/issues/80.
• Bug fix: Setting a layer blend mode correctly adds the action to the undo stack, allowing to undo the choice. The same for the layer's opacity, name, visibility, lock, clip and mask toggle, also when the model is in Edit Mode (before, CTRL+Z skipped the change and undid strokes instead).
• Bug fix: On Blender 3.6 to 4.5, opening a file and saving it without painting anything no longer empties the layers (they came back empty the next time the file was opened).
• Bug fix: Saving a texture that is a JPEG, TGA or 16 bit PNG file keeps the file in its own format. Before, it was written as a PNG (or EXR) under the same name, which Blender could still open but other programs couldn't. A PSD texture is left untouched, since Blender can't write PSD files.
• Bug fix: The CTRL+SHIFT straight line on the model crosses between UV islands whose pixel grids are rotated against each other (ex: two Keep UVs Together groups on the cone of a hat). The line used to disappear when the mouse reached the other island.

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