Replace the current box labels with toggle buttons that show or hide the rest of the box's contents.

Add tool-independent brush settings to affect a cube or sphere around the mouse.

Add a toggle to the tool UI for switching plane locking on or off, with holding the key temporarily flipping the value.

The tool should perform a flood-fill, replacing contiguous regions of the clicked-on voxel's color with the currently selected palette color. A tool option should be added allowing the flood-fill to optionally cross diagonals. The Alt mode should use the zero-index color instead of the current palette color.

Add buttons to the tile UI box to create a new tile, either at the same size or one of several presets (8x8x8, 16x16x16, 32x32x32, etc.)

The Chunk script crashes when palette colors are deleted because the palette indices still point to the now-missing color.

Add a tool that selects the color of the voxel clicked-on in the palette. The alt-mode could replace the current color with a copy of the picked color instead of simply selecting it.

Instead of having newly added palette colors be a random color, have them be white, and add a separate button for randomizing the current color.

For the color sliders where it makes sense, display a gradient showing how the values affect the color.

Add a toggle for scaling each axis by the same amount when resizing any individual one.

The ability to export tiles as OBJ files. A direct importer is not possible, for hopefully obvious reasons.

Currently these toggle buttons do nothing. They should cause the layer's associated chunks to render transparently or as a wireframe, respectively.

VTile.GetChunk() is returning null for any layers beyond the default one. This makes using multiple layers completely impossible.

Study MagicaVoxel's tools to replicate the place-on-anything-under-mouse behavior of the place tool.

Add the ability to import and export tiles as MagicaVoxel VOX files.

Like the standard tool in MagicaVoxel; fills a 3D region between the voxel initially clicked on and the voxel released over. Alt mode fills zero-index while the normal mode fills the currently selected color.

Exported files should contain the version number, and serialization logic should include appropriate branching for handling older versions.

Basic add/remove/select functionality for animations and frames, and simple playback. Ensure chunks are created and removed as appropriate.

Add a tool for selecting a rectangular region, which acts as a mask for other tools so they only affect the voxels within the box.

Add a visual color picker, with a color map and HSL sliders.

The ability to toggle the camera between perspective and orthographic views would be useful, as would being able to snap the camera at 45-degree increments for viewing on the standard and isometric axes.

Individual toggles for X, Y, and Z axes that cause paint tools to also paint the mirrored voxel along that axis.

Make scrollwheel also zoom the camera.

Add a tool for moving voxels around. The drag offset should be based on the initially selected voxel. There should also be an option toggle for wrapping the voxels around if the move outside the bounds of the tile.

If the Box Select tool is being used, the selection box should move with the voxels, which should be the only ones affected.

As of v0.1.0, even transparent pixels write to the Z buffer, which is messing up transparency rendering. To fix, split into both opaque and transparent submeshes, and create separate opaque and transparent shaders. Opaque should have ZWrite On, while transparent should do multiplicative blending.

Currently going over 65k vertices on a single chunk causes a soft crash, which is very likely on tile sizes larger than 16x16x16. This is due to a Unity limitation of 65,535 vertices per Mesh instance. There are a few optimizations that can be made to alleviate this (such as merging adjacent faces) but Chunks should support generating a list of Meshes. This will also require generating a set of MeshFilters, MeshRenderers, and MeshColliders.