By default, Minecraft shows a simple dark outline when you point at a block. This can be hard to see in bright biomes or on similarly colored blocks. Select Outline solves that problem by letting you replace the default selection outline with a custom, colorful glow that is far more visible and can be styled to match your personal taste or resource pack.

This shader is ideal for builders, redstone engineers, and anyone who frequently interacts with blocks. If you often struggle to see which block is selected, especially in snowy, sandy, or end environments, this is for you. It also works well for streamers and content creators who want a visually distinct selection effect for their viewers.

Full customization – Change the outline color, opacity, and behavior through in-game settings. You can even set different colors for different block types.
Toggleable outline – Turn the selection outline completely off for a cleaner, more immersive look when you don't need it.
Vanilla-like performance – Runs on low-end hardware; no fancy shader pipeline needed. It is designed to be as lightweight as possible while adding just a visual tweak.
Compatible with OptiFine / Iris – Works with most common shader loaders. No external mods required unless stated in the download instructions.

Requirements: Minecraft Java Edition 1.16 or newer, and either OptiFine or the Iris Shaders mod. This shader does not change lighting, shadows, or world rendering – it only modifies the block selection outline. It is not compatible with other shaders that already alter the outline; if you use a full shaderpack, disable its outline effects to avoid conflicts.

Select Outline – Custom Block Selection Glow