Decals

A decal projects a material onto the surfaces it reaches (GameObject > Chisel > Create Decal, or Add Component > Chisel > Decal).

• Box decals project their image through a box, in the direction its blue (forward) arrow points. Surfaces turned further than the Max Angle from the direction the image comes from don't take it.
• Projection: orthographic keeps the image's size at every depth; perspective projects it from a point behind the box, like a projector (with a field of view).
• Transparent decals are drawn over the surfaces they cover. Opaque decals replace the surface where they cover it; collisions aren't affected.
• Repeat (x and y) repeats the image across the box.
• Image: the whole texture, or a tile of the material's hotspot layout (an image in a trim sheet), picked from the layout. A tile can't repeat by wrapping, so a repeated tile becomes a tile of the box for every image, the last row and column cut short.
• Target limits a decal to one surface of a brush (or all of one brush's surfaces).
• A decal belongs to the model it is a child of; a decal outside any model draws on every model in its scene.
• Overlapping transparent decals are drawn in the order of the hierarchy.
• Decals become part of the level's surfaces, so they follow them when you change the shapes.

See also Trim Decals and Hotspot Mapping.