Custom Block Highlight (Outline / Overlay)
Custom Block Highlight changes the block outline the client draws around the block a player is looking at, with colors, animations and placement options.
What it does
The outline can be colored with rainbow or gradient patterns, and each of its sides can be drawn only when a chosen condition holds, such as sides that touch air. Scaling, movement and fading animations can be applied to the outline, and connected blocks are supported so that adjacent shapes read as one.
The mod can draw the outline above other terrain, which keeps it visible through walls. Settings can be copied to and loaded from files, and presets are included. Entity hitboxes, fluid source blocks and block models are also supported. The mod runs on Fabric and Ornithe, with Fabric API, Compose Multiplatform, Fabric Language Kotlin, OneConfig, Ornithe Standard Libraries and YetAnotherConfigLib (YACL) as required dependencies. It is client-side only, so servers need nothing. The license is custom and the mod is not open source, though the source code is publicly available. Builds cover 1.8.9 – 26.3 on the Fabric and Ornithe loaders.
Key features
Rainbow and gradient outlines
Outline colors can cycle through rainbow patterns or blend across gradients.
Outline animations
Scaling, movement and fading animations can be applied to the outline.
Through-terrain drawing
The outline can be drawn above other terrain, so it stays visible through walls.
Line cutting and layers
Options cut the outline lines at corners or centers and add line layers for finer control of the drawn shape.
Saved presets
Settings can be copied to and loaded from files, alongside built-in presets.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x11 of 11 versions with builds
1.20.x7 of 7 versions with builds
1.19.x1 of 1 version with builds
1.8.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Combat practice
Utilities aimed at PvP players include options for corner and center line cutting and line layers.
Shared setups
Configurations can be exported to files and loaded again, so a set of presets can be reused on other installs.
Who it’s for: Players who want a customized block outline, and players who build or fight in PvP setups where outline visibility matters.
How it compares
Dissy Block Overlay is client-side only and open source under no license named here, with files for 1.21.11 – 26.2 on Fabric. Block HightlightFX is client-side only under the GNU Lesser General Public License v3.0 only, published for 1.21.2 – 26.3 on Fabric. Item Name Gradients is client-side only, published for Fabric, Forge and NeoForge across 26.1 – 26.3, and covers item names instead of block outlines.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Custom Block Highlight (Outline / Overlay) | Fabric and Ornithe | 1.8.9 – 26.3 | Client-side only | 2026-10-02 |
| Dissy Block Overlay | Fabric | 1.21.11 – 26.2 | Client-side only | 2026-09-22 |
| Block HightlightFX | Fabric | 1.21.2 – 26.3 | Client-side only | 2026-10-13 |
| Item Name Gradients | Fabric, Forge and NeoForge | 26.1 – 26.3 | Client-side only | 2026-09-18 |
Questions
Does Custom Block Highlight need Fabric API?
Does the server need Custom Block Highlight?
Can the outline be seen through walls?
Which loaders does the mod support?
In the catalog
Custom Block Highlight (Outline / Overlay) is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
More from Goobercorp Modding Industries
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What the author says
## Powerful mod to make the block outline look interesting for once. Features include: - Rainbow coloring (and gradients) - Selective rendering of sides based on conditions (air exposed sides only, for example) - Animations (scaling, movement, and fading) - Support for connected blocks - Scale adjustment - Drawing…
Official listing
- Modrinth page
- modrinth.com/mod/custom-block-highlight
- Owner
- Goobercorp Modding Industries
- Published
- 2023-12-04
- Updated on Modrinth
- 2026-10-02
- Facts verified
- 2026-10-15