Final docs

.claude/display-shader.md

@@ -43,8 +43,21 @@ typedef union shadermaterial_u {
 } shadermaterial_t;
 ```
 
-`shaderunlitmaterial_t` typically holds a `texture_t *` and a
-tint colour. Check `shaderunlitmaterial.h` for the exact fields.
+`shaderunlitmaterial_t` fields:
+
+```c
+typedef struct {
+  color_t color;      // tint colour (multiplied with the texture sample)
+  texture_t *texture; // NULL uses TEXTURE_WHITE (solid colour draw)
+} shaderunlitmaterial_t;
+```
+
+The shader exposes uniforms `u_Proj`, `u_View`, `u_Model` (mat4),
+`u_Texture` (sampler), and `u_Color` (vec4). They are uploaded via
+`shaderUnlitSetMaterial(shader, material)`.
+
+A global singleton `SHADER_UNLIT` is the live shader object;
+`SHADER_UNLIT_DEFINITION` is its platform definition descriptor.
 
 To use a shader material on a renderable entity: