src/render.rs

@@ -379,6 +379,16 @@ pub fn render_perspective_with_quality(
                 if let Some(terrain_h) = sample_height_bilinear(grid, p.x, p.z) {
                     let terrain_h = terrain_height(scene, terrain_h);
                     if p.y <= terrain_h {
+                        let nx = if grid_w > 1.0 {
+                            (p.x / (grid_w - 1.0)).clamp(0.0, 1.0)
+                        } else {
+                            0.5
+                        };
+                        let nz = if grid_h > 1.0 {
+                            (p.z / (grid_h - 1.0)).clamp(0.0, 1.0)
+                        } else {
+                            0.5
+                        };
                         let band = surface_color(scene, terrain_h, nx, nz);
                         let distance_fade = (t / max_dist).clamp(0.0, 1.0);
                         let fade = distance_fade * haze_strength;