diff --git a/html/layers.js b/html/layers.js
index 4b4433c..3157c21 100644
--- a/html/layers.js
+++ b/html/layers.js
@@ -214,6 +214,7 @@ function createBaseLayers() {
         world.push(vtlayer);
     }
 
+    /* seems defunct
     world.push(new ol.layer.Tile({
         source: new ol.source.OSM({
             url: 'https://gibs-{a-c}.earthdata.nasa.gov/wmts/epsg3857/best/BlueMarble_ShadedRelief_Bathymetry/default/EPSG3857_500m/{z}/{y}/{x}.jpeg',
@@ -222,10 +223,11 @@ function createBaseLayers() {
             maxZoom: 8,
             transition: tileTransition,
         }),
-        name: 'gibs_reliev',
+        name: 'gibs_relief',
         title: 'GIBS Relief',
         type: 'base',
     }));
+    */
 
     const date = new Date(Date.now() - 86400 * 1000);
     const yesterday = date.getUTCFullYear() + '-' + (date.getUTCMonth() + 1).toString().padStart(2, '0') + '-' + date.getUTCDate().toString().padStart(2, '0');
diff --git a/html/script.js b/html/script.js
index 0777f0c..31b0cc3 100644
--- a/html/script.js
+++ b/html/script.js
@@ -125,7 +125,7 @@ let labels_top = false;
 let lockDotCentered = false;
 let overrideMapType = null;
 let layerMoreContrast = false;
-let layerExtraDim = 0;
+let layerDimFactor = 0;
 let layerExtraContrast = 0;
 let shareFiltersParam = false;
 let lastRequestSize = 0;
@@ -4948,19 +4948,17 @@ function togglePersistence() {
 
 function dim(evt) {
     try {
-        let currentDimPercentage;
-        let currentContrastPercentage;
+        let currentDimPercentage = mapDimPercentage * layerDimFactor;
+        let currentContrastPercentage = mapContrastPercentage + layerExtraContrast;
 
-        if (toggles['MapDim'].state) {
-            currentDimPercentage = mapDimPercentage;
-            currentContrastPercentage = mapContrastPercentage;
-        } else {
-            currentDimPercentage = mapDimPercentage / 4;
-            currentContrastPercentage = mapContrastPercentage / 4 + 0.01;
+        if (!toggles['MapDim'].state) {
+            // slight dim even if disabled
+            currentDimPercentage /= 4;
+            currentContrastPercentage /= 4;
         }
 
-        const dim = currentDimPercentage * (1 + 0.25 * toggles['darkerColors'].state) + layerExtraDim;
-        const contrast = currentContrastPercentage * (1 + 0.1 * toggles['darkerColors'].state) + layerExtraContrast;
+        const dim = currentDimPercentage * (1 + 0.25 * toggles['darkerColors'].state);
+        const contrast = currentContrastPercentage * (1 + 0.1 * toggles['darkerColors'].state);
         if (dim > 0.0001) {
             evt.context.globalCompositeOperation = 'multiply';
             evt.context.fillStyle = 'rgba(0,0,0,'+dim+')';
@@ -8953,15 +8951,22 @@ function setSelectedIcao() {
 
 function mapTypeSettings() {
     if (MapType_tar1090.startsWith('maptiler_sat') || MapType_tar1090.startsWith('maptiler_hybrid')) {
-        layerExtraDim = -0.30;
+        layerDimFactor = 0.25;
+    } else if (MapType_tar1090 == 'esri') {
+        layerDimFactor = 0.5;
+    } else if (MapType_tar1090 == 'gibs') {
+        layerDimFactor = 0.5;
     } else if (MapType_tar1090.startsWith('carto_raster')) {
-        layerExtraDim = -0.15;
+        layerDimFactor = 0.70;
         layerExtraContrast = 0.6;
     } else if (MapType_tar1090.startsWith('carto_light')) {
-        layerExtraDim = -0.05;
+        layerDimFactor = 0.80;
         layerExtraContrast = 0.2;
+    } else if (MapType_tar1090.startsWith('carto_dark')) {
+        layerDimFactor = 0.25;
+        layerExtraContrast = 0.05;
     } else {
-        layerExtraDim = 0;
+        layerDimFactor = 1;
         layerExtraContrast = 0;
     }
 }