Detailed 32 px imp sprite and finer world pixel rows (540, 1080)

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

src/main.rs

@@ -478,7 +478,7 @@ fn apply_settings(s: &Settings, r3d: &mut R3d) {
     r3d.outlines = s.outlines;
     r3d.set_wall_detail(s.wall_subdivisions());
     r3d.max_lights = s.max_lights as usize;
-    r3d.pixel_rows = if [270, 360, 480].contains(&s.pixel_rows) { s.pixel_rows as u32 } else { 360 };
+    r3d.pixel_rows = settings::pixel_rows(s.pixel_rows);
     audio::set_volumes(s.music_volume, s.volume, s.muted);
 }
 
@@ -985,7 +985,7 @@ async fn main() {
         };
         ui::set_touch(touch_mode);
         // pixel look: the interface on a virtual screen whose pixels are whole parts of the world's
-        let rows = if [270, 360, 480].contains(&app.settings.pixel_rows) { app.settings.pixel_rows as u32 } else { 360 };
+        let rows = settings::pixel_rows(app.settings.pixel_rows);
         // the interface needs room: the smallest whole multiple of the world's rows with at least
         // 900 rows (360 -> 1080), on a desktop and on a touch screen alike (a phone has about
         // 1080 device rows in landscape; a smaller screen draws in device pixels)