diff --git a/src/MapLayers/BiomeLayer.ts b/src/MapLayers/BiomeLayer.ts
index eeb64b1..5b60673 100644
--- a/src/MapLayers/BiomeLayer.ts
+++ b/src/MapLayers/BiomeLayer.ts
@@ -130,7 +130,7 @@ export class BiomeLayer extends L.GridLayer {
 				let hillshade = 1.0
 				const y = project_down ? Math.min(tile.array[x + 1][z + 1].surface, this.y.value) : this.y.value
 				const belowSurface = y < tile.array[x + 1][z + 1].surface
-				if (tile.array[x + 1][z + 1].terrain < 0){
+				if (do_hillshade && tile.array[x + 1][z + 1].terrain < 0){
 					hillshade = 0.15
 				} else if (do_hillshade && project_down && !belowSurface) {
 
diff --git a/src/MapLayers/Graticule.ts b/src/MapLayers/Graticule.ts
index 0269431..1a28fcc 100644
--- a/src/MapLayers/Graticule.ts
+++ b/src/MapLayers/Graticule.ts
@@ -74,7 +74,6 @@ export class Graticule extends LayerGroup {
         var x_line_min = Math.floor(nw.x / distance) * distance
         var z_line_min = Math.floor(se.y / distance) * distance
 
-        console.log(x_line_count + ", " + z_line_count)
         var lines = new Array(x_line_count + z_line_count)
 
         for (var i = 0 ; i <= x_line_count ; i++){
diff --git a/src/components/MainMap.vue b/src/components/MainMap.vue
index c2b09eb..11f794c 100644
--- a/src/components/MainMap.vue
+++ b/src/components/MainMap.vue
@@ -140,7 +140,7 @@ function getPosition(map: L.Map, latlng: L.LatLng) {
     const pos = crs.project(latlng)
     pos.y *= -1
 
-    const surface = (loadedDimensionStore.surface_density_function)?.compute(DensityFunction.context((pos.x >> 2) << 2, 0, (pos.y >> 2) << 2)) ?? Number.POSITIVE_INFINITY
+    const surface = (loadedDimensionStore.surface_density_function)?.compute(DensityFunction.context((pos.x >> 2) << 2, y.value, (pos.y >> 2) << 2)) ?? Number.POSITIVE_INFINITY
 
     const pos_y: number = project_down.value ? Math.min(surface, y.value) : y.value
     return BlockPos.create(pos.x, pos_y, pos.y)
@@ -313,7 +313,7 @@ watch(searchStore.structures, () => {
                 <YSlider class="slider" v-model:y="y" />
             </Suspense>
             <MapButton icon="fa-arrows-down-to-line" :disabled="loadedDimensionStore.surface_density_function === undefined" v-model="project_down" :title="$t('map.setting.project')" />
-            <MapButton icon="fa-mountain-sun" :disabled="!project_down || loadedDimensionStore.surface_density_function === undefined" v-model="do_hillshade"  :title="$t('map.setting.hillshade')" />
+            <MapButton icon="fa-mountain-sun" :disabled="(!project_down || loadedDimensionStore.surface_density_function === undefined) && ! loadedDimensionStore.terrain_density_function" v-model="do_hillshade"  :title="$t('map.setting.hillshade')" />
             <MapButton icon="fa-water" :disabled="loadedDimensionStore.surface_density_function === undefined" v-model="show_sealevel" :title="$t('map.setting.sealevel')" />
             <MapButton icon="fa-table-cells" v-model="show_graticule" :title="$t('map.setting.graticule')" />
         </div>
diff --git a/src/components/YSlider.vue b/src/components/YSlider.vue
index 68753d2..e3f7e73 100644
--- a/src/components/YSlider.vue
+++ b/src/components/YSlider.vue
@@ -25,7 +25,7 @@ defineEmits(['update:y'])
 
 <template>
     <div class="slider">
-        <vue-slider :dot-attrs="{'aria-label': $t('map.yslider.aria-label')}" v-if="y_limits !== undefined" direction="btt" height="6rem" tooltip-placement="left" tooltip="hover" :lazy="true" :process="false"
+        <vue-slider :dot-attrs="{'aria-label': $t('map.yslider.aria-label')}" v-if="y_limits !== undefined" direction="btt" height="18rem" tooltip-placement="left" tooltip="hover" :lazy="true" :process="false"
             v-bind:model-value="y"
             @change="y => $emit('update:y', y)"
             :max="y_limits[1]" :min="y_limits[0]"
diff --git a/src/stores/useLoadedDimensionStore.ts b/src/stores/useLoadedDimensionStore.ts
index 4f3733c..16e7d29 100644
--- a/src/stores/useLoadedDimensionStore.ts
+++ b/src/stores/useLoadedDimensionStore.ts
@@ -209,6 +209,15 @@ export const useLoadedDimensionStore = defineStore('loaded_dimension', () => {
         }
     })
 
+    const terrain_density_function = computed(() => {
+        const surface_density_function_id = getCustomDensityFunction("map_simple_terrain", loaded_dimension.noise_settings_id ?? Identifier.create("empty"), settingsStore.dimension)
+        if (surface_density_function_id !== undefined){
+            return new DensityFunction.HolderHolder(Holder.reference(WorldgenRegistries.DENSITY_FUNCTION, surface_density_function_id)).mapAll((random_state.value).createVisitor((noise_generator_settings.value).noise, (noise_generator_settings.value).legacyRandomSource))
+        } else {
+            return undefined
+        }
+    })    
+
     function getIcon(id: Identifier){
         const item = loaded_dimension.structure_icons?.get(id.toString()) ?? Identifier.create(VANILLA_ITEMS[Math.abs(hashCode(id.toString())) % VANILLA_ITEMS.length]) 
         return `https://raw.githubusercontent.com/jacobsjo/mcicons/icons/item/${item.path}.png`
@@ -231,6 +240,6 @@ export const useLoadedDimensionStore = defineStore('loaded_dimension', () => {
         return biome_source
     }
 
-    return { loaded_dimension, noise_generator_settings, sampler, surface_density_function, reload, getIcon, getBiomeColor, getBiomeSource }
+    return { loaded_dimension, noise_generator_settings, sampler, surface_density_function, terrain_density_function, reload, getIcon, getBiomeColor, getBiomeSource }
 })
 
diff --git a/src/webworker/MultiNoiseCalculator.ts b/src/webworker/MultiNoiseCalculator.ts
index d929bdf..23c3f52 100644
--- a/src/webworker/MultiNoiseCalculator.ts
+++ b/src/webworker/MultiNoiseCalculator.ts
@@ -129,7 +129,7 @@ class MultiNoiseCalculator {
 			for (let iz = -1; iz < tileSize + 2; iz++) {
 				const x = ix * step + min_x
 				const z = iz * step + min_z
-				const surface = this.state.surfaceDensityFunction?.compute(DensityFunction.context(x * 4, 0, z * 4)) ?? Number.POSITIVE_INFINITY
+				const surface = this.state.surfaceDensityFunction?.compute(DensityFunction.context(x * 4, this.state.y, z * 4)) ?? Number.POSITIVE_INFINITY
 				const y = this.state.projectDown ? Math.min(surface, this.state.y) : this.state.y
 				const biome = this.state.biomeSource?.getBiome(x, y >> 2, z, this.state.sampler!).toString() ?? "minecraft:plains"
 				const terrain = this.state.terrainDensityFunction?.compute(DensityFunction.context(x * 4, y , z * 4)) ?? Number.POSITIVE_INFINITY