Halloween Pumpkin Heads runs on the core shaders system. In vanilla Minecraft, core shaders load through the normal resource pack menu, not through a shader loader's shader pack screen.
Enabling the Pack
1. From the title screen or the pause menu, open Options → Resource Packs.
2. Find Halloween Pumpkin Heads in the Available list on the left. If it is missing, click Open Pack Folder, check that the pack file is in the resourcepacks folder, then reopen the menu.
3. Click the arrow on the pack to move it to the Selected list on the right.
4.
Checking That It Works
- Load any world and find a mob, such as a cow, zombie or villager. It should now have a carved pumpkin where its head is.
- Press F5 to switch to third-person view and look at your own character. Players get a pumpkin head too.
- The pumpkins use a simple 8x style, so they should sit comfortably next to vanilla textures. If you see blocky orange heads that match the rest of the game, the pack is working.
To turn the effect off after your Halloween session, return to Resource Packs and move the pack back to the Available list. The pack only changes how entities look, so you can switch it on and off as often as you like without affecting your world.