3D resolution setting extended down to 1/16

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/menu.rs

@@ -139,7 +139,7 @@ fn item_change(it: Item, s: &mut Settings, d: i32) {
         Item::WallDetail => s.wall_detail = cycle(&[1u8, 2, 3], s.wall_detail, d),
         Item::Lights => s.max_lights = cycle(&[8u8, 16, 24], s.max_lights, d),
         Item::UiScale => s.ui_factor = cycle(&[0u8, 1, 2, 3, 4], s.ui_factor, d),
-        Item::RenderScale => s.render_scale = cycle(&[1u8, 2, 3, 4], s.render_scale.max(1), d),
+        Item::RenderScale => s.render_scale = cycle(&(1u8..=16).collect::<Vec<u8>>(), s.render_scale.clamp(1, 16), d),
         Item::GameSpeed => s.game_speed = cycle(&[1.0f32, 2.0], s.game_speed, d),
         Item::Hints => s.hints = !s.hints,
     }