feat(shader): Remove shader path functions and related module references

scripts/cube_logic.lua

@@ -230,10 +230,6 @@ if cube_mesh_info.loaded then
     end
 end
 
-local shader_variants_module = require("shader_variants")
-local shader_variants
-shader_variants, skybox_color = shader_variants_module.build_cube_variants(config, log_debug, skybox_color)
-
 local camera = {
     position = {0.0, 0.0, 5.0},
     yaw = math.pi,  -- Face toward -Z (center of room)
@@ -1044,11 +1040,6 @@ function get_scene_objects()
     return objects
 end
 
-function get_shader_paths()
-    return shader_variants
-end
-
-
 local function build_view_state(aspect)
     local now = get_time_seconds()
     local dt = 0.0

scripts/gui_demo.lua

@@ -169,11 +169,6 @@ function get_scene_objects()
     return {}  -- No 3D objects
 end
 
-function get_shader_paths()
-    -- MaterialX shaders are configured via JSON materialx_materials
-    return {}
-end
-
 function get_view_projection(aspect)
     if not viewProjectionLogged then
         log_trace("GUI demo view projection: identity (aspect=%.2f)", aspect)

scripts/quake3_arena.lua

@@ -598,11 +598,6 @@ function get_scene_objects()
     }
 end
 
-function get_shader_paths()
-    -- MaterialX shaders are configured via JSON materialx_materials
-    return {}
-end
-
 local function build_view_state(aspect)
     local now = get_time_seconds()
     local dt = 0.0

scripts/soundboard.lua

@@ -224,8 +224,6 @@ local cubeIndices = {
     1, 2, 6, 6, 5, 1,
 }
 
-local shaderVariants = require("shader_variants").build_soundboard_variants()
-
 local camera = {
     eye = { 2.0, 2.0, 3.0 },
     center = { 0.0, 0.0, 0.0 },
@@ -264,10 +262,6 @@ function get_scene_objects()
     return { createCube({ 0.0, 0.0, -4.0 }) }
 end
 
-function get_shader_paths()
-    return shaderVariants
-end
-
 function get_view_projection(aspect)
     local view = math3d.look_at(camera.eye, camera.center, camera.up)
     local projection = math3d.perspective(camera.fov, aspect, camera.near, camera.far)