# PSX Shader NB
This shader pack is a fork of ckosmic's [Minecraft PSX Shader](https://github.com/ckosmic/minecraft-psx) that mimics the look and feel of PlayStation 1 graphics.
## Changes in this Fork
### No-Bounce Vertex Fix
Changed vertex transformation to eliminate the bouncing effect when moving.
Changed the vertex transformation from:
```glsl
vec4 position4 = mat4(gl_ModelViewMatrix) * vec4(gl_Vertex) + gl_ModelViewMatrix[3].xyzw;
```
to standard transformation:
```glsl
vec4 position4 = gl_ModelViewMatrix * vec4(gl_Vertex);
```
### Dynamic Hand Light
Added real dynamic lighting from held light sources (torches, lanterns, etc.). Light now updates continuously as you move, rather than only when breaking/placing blocks. Uses `heldBlockLightValue` / `heldBlockLightValue2` uniforms with linear distance falloff matching vanilla placed light behavior, applied to terrain, entities, water, hand, and basic geometry shaders. Supports both main hand and off hand light sources.
## Installation
Place this shader pack in your Minecraft `shaderpacks` folder.
This shader pack works with both [OptiFine](https://optifine.net/) and [Iris](https://modrinth.com/mod/iris).
## Credits
- Original shader by ckosmic
- Iris compatibility by Karen/あけみ (akemin_dayo)
## License
Licensed under the [MIT License](https://choosealicense.com/licenses/mit/).
