try higher resolution for a couple images for testing

index.html

@@ -23,13 +23,13 @@
         <img id="lhc0" crossorigin="anonymous" src="img/MA27852_Panorama_2048.jpg">
         <img id="lhc1" crossorigin="anonymous" src="img/MA27860_Panorama_2048.jpg">
 
-        <img id="p50" crossorigin="anonymous" src="img/1102319_02_2048.jpg">
+        <img id="p50" crossorigin="anonymous" src="img/1102319_02_4096.jpg">
         <img id="p51" crossorigin="anonymous" src="img/1102319_03_2048.jpg">
 
         <img id="cms0" crossorigin="anonymous" src="img/Jl1MSV90aJ1L_equirectangular_2048.jpg">
         <img id="cms1" crossorigin="anonymous" src="img/0pOgmYSEETO5_equirectangular_2048.jpg">
         <img id="cms2" crossorigin="anonymous" src="img/1cvTuu1MUXmS_equirectangular_2048.jpg">
-        <img id="cms3" crossorigin="anonymous" src="img/CMS_equirectangular_2048.jpg">
+        <img id="cms3" crossorigin="anonymous" src="img/CMS_equirectangular_4096.jpg">
 
         <img id="cms0-thumb" crossorigin="anonymous" src="img/cms0_thumb.jpg">
         <img id="cms1-thumb" crossorigin="anonymous" src="img/cms1_thumb.jpg">