diff --git a/dist/file-icon-extra.css b/dist/file-icon-extra.css
index 4c9a5f6..4683fb3 100644
--- a/dist/file-icon-extra.css
+++ b/dist/file-icon-extra.css
@@ -32,10 +32,22 @@
   content: '\00a0';
 }
 
-.fiv-ext.fiv-icon-folder-closed {
-  background-image: url("icons/extra/folder-closed.svg");
+.fiv-ext.fiv-icon-folder-images {
+  background-image: url("icons/extra/folder-images.svg");
 }
 
 .fiv-ext.fiv-icon-folder-open {
   background-image: url("icons/extra/folder-open.svg");
 }
+
+.fiv-ext.fiv-icon-folder-photos {
+  background-image: url("icons/extra/folder-photos.svg");
+}
+
+.fiv-ext.fiv-icon-folder-tree {
+  background-image: url("icons/extra/folder-tree.svg");
+}
+
+.fiv-ext.fiv-icon-folder {
+  background-image: url("icons/extra/folder.svg");
+}
diff --git a/dist/file-icon-extra.min.css b/dist/file-icon-extra.min.css
index 138113d..8394335 100644
--- a/dist/file-icon-extra.min.css
+++ b/dist/file-icon-extra.min.css
@@ -8,5 +8,8 @@
 .fiv-size-xl{font-size:4.75em}
 .fiv-ext{position:relative;display:inline-block;line-height:1em;width:1em}
 .fiv-ext:before{content:'\00a0'}
-.fiv-ext.fiv-icon-folder-closed{background-image:url("icons/extra/folder-closed.svg")}
-.fiv-ext.fiv-icon-folder-open{background-image:url("icons/extra/folder-open.svg")}
\ No newline at end of file
+.fiv-ext.fiv-icon-folder-images{background-image:url("icons/extra/folder-images.svg")}
+.fiv-ext.fiv-icon-folder-open{background-image:url("icons/extra/folder-open.svg")}
+.fiv-ext.fiv-icon-folder-photos{background-image:url("icons/extra/folder-photos.svg")}
+.fiv-ext.fiv-icon-folder-tree{background-image:url("icons/extra/folder-tree.svg")}
+.fiv-ext.fiv-icon-folder{background-image:url("icons/extra/folder.svg")}
\ No newline at end of file
diff --git a/dist/file-icon-high-contrast.css b/dist/file-icon-high-contrast.css
index 17be978..f5de56d 100644
--- a/dist/file-icon-high-contrast.css
+++ b/dist/file-icon-high-contrast.css
@@ -248,6 +248,10 @@
   background-image: url("icons/high-contrast/heic.svg");
 }
 
+.fiv-hct.fiv-icon-idx {
+  background-image: url("icons/high-contrast/idx.svg");
+}
+
 .fiv-hct.fiv-icon-iff {
   background-image: url("icons/high-contrast/iff.svg");
 }
diff --git a/dist/file-icon-high-contrast.min.css b/dist/file-icon-high-contrast.min.css
index fbc0e34..2313a2c 100644
--- a/dist/file-icon-high-contrast.min.css
+++ b/dist/file-icon-high-contrast.min.css
@@ -62,6 +62,7 @@
 .fiv-hct.fiv-icon-flac{background-image:url("icons/high-contrast/flac.svg")}
 .fiv-hct.fiv-icon-gz{background-image:url("icons/high-contrast/gz.svg")}
 .fiv-hct.fiv-icon-heic{background-image:url("icons/high-contrast/heic.svg")}
+.fiv-hct.fiv-icon-idx{background-image:url("icons/high-contrast/idx.svg")}
 .fiv-hct.fiv-icon-iff{background-image:url("icons/high-contrast/iff.svg")}
 .fiv-hct.fiv-icon-image{background-image:url("icons/high-contrast/image.svg")}
 .fiv-hct.fiv-icon-inc{background-image:url("icons/high-contrast/inc.svg")}
diff --git a/dist/file-icon-vectors.css b/dist/file-icon-vectors.css
index 585c040..713d899 100644
--- a/dist/file-icon-vectors.css
+++ b/dist/file-icon-vectors.css
@@ -43,14 +43,26 @@
   content: '\00a0';
 }
 
-.fiv-ext.fiv-icon-folder-closed {
-  background-image: url("icons/extra/folder-closed.svg");
+.fiv-ext.fiv-icon-folder-images {
+  background-image: url("icons/extra/folder-images.svg");
 }
 
 .fiv-ext.fiv-icon-folder-open {
   background-image: url("icons/extra/folder-open.svg");
 }
 
+.fiv-ext.fiv-icon-folder-photos {
+  background-image: url("icons/extra/folder-photos.svg");
+}
+
+.fiv-ext.fiv-icon-folder-tree {
+  background-image: url("icons/extra/folder-tree.svg");
+}
+
+.fiv-ext.fiv-icon-folder {
+  background-image: url("icons/extra/folder.svg");
+}
+
 .fiv-cla {
   position: relative;
   display: inline-block;
@@ -5051,6 +5063,10 @@
   background-image: url("icons/high-contrast/heic.svg");
 }
 
+.fiv-hct.fiv-icon-idx {
+  background-image: url("icons/high-contrast/idx.svg");
+}
+
 .fiv-hct.fiv-icon-iff {
   background-image: url("icons/high-contrast/iff.svg");
 }
@@ -5422,10 +5438,22 @@
   content: '\00a0';
 }
 
-.fiv-ext.fiv-icon-folder-closed {
-  background-image: url("icons/extra/folder-closed.svg");
+.fiv-ext.fiv-icon-folder-images {
+  background-image: url("icons/extra/folder-images.svg");
 }
 
 .fiv-ext.fiv-icon-folder-open {
   background-image: url("icons/extra/folder-open.svg");
 }
+
+.fiv-ext.fiv-icon-folder-photos {
+  background-image: url("icons/extra/folder-photos.svg");
+}
+
+.fiv-ext.fiv-icon-folder-tree {
+  background-image: url("icons/extra/folder-tree.svg");
+}
+
+.fiv-ext.fiv-icon-folder {
+  background-image: url("icons/extra/folder.svg");
+}
diff --git a/dist/file-icon-vectors.min.css b/dist/file-icon-vectors.min.css
index e63f3b6..3f7beff 100644
--- a/dist/file-icon-vectors.min.css
+++ b/dist/file-icon-vectors.min.css
@@ -13,8 +13,11 @@
 .fiv-size-xl{font-size:4.75em}
 .fiv-ext{position:relative;display:inline-block;line-height:1em;width:1em}
 .fiv-ext:before{content:'\00a0'}
-.fiv-ext.fiv-icon-folder-closed{background-image:url("icons/extra/folder-closed.svg")}
+.fiv-ext.fiv-icon-folder-images{background-image:url("icons/extra/folder-images.svg")}
 .fiv-ext.fiv-icon-folder-open{background-image:url("icons/extra/folder-open.svg")}
+.fiv-ext.fiv-icon-folder-photos{background-image:url("icons/extra/folder-photos.svg")}
+.fiv-ext.fiv-icon-folder-tree{background-image:url("icons/extra/folder-tree.svg")}
+.fiv-ext.fiv-icon-folder{background-image:url("icons/extra/folder.svg")}
 .fiv-cla{position:relative;display:inline-block;line-height:1em;width:.72em}
 .fiv-cla:before{content:'\00a0'}
 .fiv-cla.fiv-icon-3g2{background-image:url("icons/classic/3g2.svg")}
@@ -1262,6 +1265,7 @@
 .fiv-hct.fiv-icon-flac{background-image:url("icons/high-contrast/flac.svg")}
 .fiv-hct.fiv-icon-gz{background-image:url("icons/high-contrast/gz.svg")}
 .fiv-hct.fiv-icon-heic{background-image:url("icons/high-contrast/heic.svg")}
+.fiv-hct.fiv-icon-idx{background-image:url("icons/high-contrast/idx.svg")}
 .fiv-hct.fiv-icon-iff{background-image:url("icons/high-contrast/iff.svg")}
 .fiv-hct.fiv-icon-image{background-image:url("icons/high-contrast/image.svg")}
 .fiv-hct.fiv-icon-inc{background-image:url("icons/high-contrast/inc.svg")}
@@ -1354,5 +1358,8 @@
 .fiv-hct.fiv-icon-zsh{background-image:url("icons/high-contrast/zsh.svg")}
 .fiv-ext{position:relative;display:inline-block;line-height:1em;width:1em}
 .fiv-ext:before{content:'\00a0'}
-.fiv-ext.fiv-icon-folder-closed{background-image:url("icons/extra/folder-closed.svg")}
-.fiv-ext.fiv-icon-folder-open{background-image:url("icons/extra/folder-open.svg")}
\ No newline at end of file
+.fiv-ext.fiv-icon-folder-images{background-image:url("icons/extra/folder-images.svg")}
+.fiv-ext.fiv-icon-folder-open{background-image:url("icons/extra/folder-open.svg")}
+.fiv-ext.fiv-icon-folder-photos{background-image:url("icons/extra/folder-photos.svg")}
+.fiv-ext.fiv-icon-folder-tree{background-image:url("icons/extra/folder-tree.svg")}
+.fiv-ext.fiv-icon-folder{background-image:url("icons/extra/folder.svg")}
\ No newline at end of file
diff --git a/dist/icons/extra/catalog.json b/dist/icons/extra/catalog.json
index a6f83f6..0604916 100644
--- a/dist/icons/extra/catalog.json
+++ b/dist/icons/extra/catalog.json
@@ -1 +1 @@
-["folder-closed","folder-open"]
\ No newline at end of file
+["folder-images","folder-open","folder-photos","folder-tree","folder"]
\ No newline at end of file
diff --git a/dist/icons/extra/folder-images.svg b/dist/icons/extra/folder-images.svg
new file mode 100644
index 0000000..67251f7
--- /dev/null
+++ b/dist/icons/extra/folder-images.svg
@@ -0,0 +1 @@
+<svg id="Layer_1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><style>.st2{fill:#f57c00}</style><g id="surface1"><path d="M90 20H45L35 10H10C4.5 10 0 14.5 0 20v20h100V30c0-5.5-4.5-10-10-10z" fill="#ffa000"/><path d="M90 20H10C4.5 20 0 24.5 0 30v50c0 5.5 4.5 10 10 10h80c5.5 0 10-4.5 10-10V30c0-5.5-4.5-10-10-10z" fill="#ffca28"/><path class="st2" d="M80 40c0 4.1-3.4 7.5-7.5 7.5S65 44.1 65 40s3.4-7.5 7.5-7.5S80 35.9 80 40z"/><path d="M40 44.7L17.5 77.5h45L40 44.7z" fill="#ef6c00"/><path class="st2" d="M67.5 58.8l-15 18.8h30l-15-18.8z"/></g></svg>
\ No newline at end of file
diff --git a/dist/icons/extra/folder-photos.svg b/dist/icons/extra/folder-photos.svg
new file mode 100644
index 0000000..65b4d4f
--- /dev/null
+++ b/dist/icons/extra/folder-photos.svg
@@ -0,0 +1 @@
+<svg id="Layer_1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><style>.st2{fill:#03a9f4}</style><path d="M90 20H45L35 10H10C4.5 10 0 14.5 0 20v20h100V30c0-5.5-4.5-10-10-10z" fill="#ffa000"/><path d="M90 20H10C4.5 20 0 24.5 0 30v50c0 5.5 4.5 10 10 10h80c5.5 0 10-4.5 10-10V30c0-5.5-4.5-10-10-10z" fill="#ffca28"/><g id="surface1_1_"><path class="st2" d="M74 72.3c0 1.5-1.2 2.7-2.7 2.7H28.7c-1.5 0-2.7-1.2-2.7-2.7V43c0-1.5 1.2-2.7 2.7-2.7h42.7c1.5 0 2.7 1.2 2.7 2.7v29.3z"/><path class="st2" d="M62 44.3c0 1.5-1.2 2.7-2.7 2.7H40.7c-1.5 0-2.7-1.2-2.7-2.7v-6.7c0-1.5 1.2-2.7 2.7-2.7h18.7c1.5 0 2.7 1.2 2.7 2.7v6.7z"/><path d="M70 47c0 1.5-1.2 2.7-2.7 2.7-1.5 0-2.7-1.2-2.7-2.7s1.2-2.7 2.7-2.7c1.5 0 2.7 1.2 2.7 2.7z" fill="#fff"/><path d="M63.3 57.7C63.3 65 57.4 71 50 71s-13.3-6-13.3-13.3 6-13.3 13.3-13.3 13.3 5.9 13.3 13.3z" fill="#b3e5fc"/><path d="M60.7 57.7c0 5.9-4.8 10.7-10.7 10.7s-10.7-4.8-10.7-10.7S44.1 47 50 47s10.7 4.8 10.7 10.7z" fill="#01579b"/><path d="M44.7 63c0 1.6.3 3 .9 4.4 1.3.6 2.8 1 4.4 1 5.9 0 10.7-4.8 10.7-10.7 0-1.6-.3-3-1-4.4-1.3-.6-2.8-1-4.4-1-5.9 0-10.6 4.8-10.6 10.7z" fill="#0277bd"/></g></svg>
\ No newline at end of file
diff --git a/dist/icons/extra/folder-tree.svg b/dist/icons/extra/folder-tree.svg
new file mode 100644
index 0000000..038abfa
--- /dev/null
+++ b/dist/icons/extra/folder-tree.svg
@@ -0,0 +1 @@
+<svg id="Layer_1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><style>.st0{fill:#90a4ae}.st1{fill:#ffa000}.st2{fill:#ffca28}</style><g id="surface1"><path class="st0" d="M63.2 92.1H15.8v-71h5.3v65.7h42.1z"/><path class="st0" d="M18.4 44.7h44.7V50H18.4z"/><path class="st1" d="M35.5 5.3h-16L14.2 0H3.9C1.8 0 0 1.8 0 3.9v23.7c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V9.2c.1-2.1-1.8-3.9-3.9-3.9z"/><path class="st2" d="M35.5 5.3H3.9C1.8 5.3 0 7.1 0 9.2v18.4c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V9.2c.1-2.1-1.8-3.9-3.9-3.9z"/><path class="st1" d="M96.1 34.2H80l-5.3-5.3H64.5c-2.1 0-3.9 1.8-3.9 3.9v23.7c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V38.2c0-2.1-1.8-4-3.9-4z"/><path class="st2" d="M96.1 34.2H64.5c-2.1 0-3.9 1.8-3.9 3.9v18.4c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V38.2c0-2.1-1.8-4-3.9-4z"/><path class="st1" d="M96.1 73.7H80l-5.3-5.3H64.5c-2.1 0-3.9 1.8-3.9 3.9V96c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V77.6c0-2.1-1.8-3.9-3.9-3.9z"/><path class="st2" d="M96.1 73.7H64.5c-2.1 0-3.9 1.8-3.9 3.9V96c0 2.1 1.8 3.9 3.9 3.9h31.6c2.1 0 3.9-1.8 3.9-3.9V77.6c0-2.1-1.8-3.9-3.9-3.9z"/></g></svg>
\ No newline at end of file
diff --git a/dist/icons/extra/folder-closed.svg b/dist/icons/extra/folder.svg
similarity index 100%
rename from dist/icons/extra/folder-closed.svg
rename to dist/icons/extra/folder.svg
diff --git a/dist/icons/high-contrast/bz2.svg b/dist/icons/high-contrast/bz2.svg
index a4dd906..e69de29 100644
--- a/dist/icons/high-contrast/bz2.svg
+++ b/dist/icons/high-contrast/bz2.svg
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path d="M91.6 28.7H76.9V14.1l14.7 14.6zM52.1 14.1v53.3h39.6V32.2H73.4V13.9H52.1v.2zM58.2 0H14.5v10.4h17.2l-10.9 8.3v8.9l15.9-12.2v-5h55.7V6.1L58.2 0zM36.9 22.4L21 34.6v8.9l15.9-12.2v-8.9zm-16.1 37l15.9-12.2v-8.9L20.8 50.6v8.8zm16.1 3.7v-8.9L21 66.5v4.8h-6.3v10.4h9.8v7h-5.9c-1.1-1.9-3-3-5.2-3-3.3 0-5.9 2.6-5.9 5.9 0 3.3 2.6 5.9 5.9 5.9 2.2 0 4.1-1.1 5.2-3h5.7v5.4h8.9v-5.4H39c1.1 1.9 3 3 5.2 3 3.3 0 5.9-2.6 5.9-5.9 0-3.3-2.6-5.9-5.9-5.9-2.2 0-4.1 1.1-5.2 3h-5.7v-7h25l34.3-6.1v-4.3H26.2l10.7-8.2z" fill="#fc3"/></svg>
\ No newline at end of file
diff --git a/dist/icons/high-contrast/catalog.json b/dist/icons/high-contrast/catalog.json
index 96698f8..d94a1d1 100644
--- a/dist/icons/high-contrast/catalog.json
+++ b/dist/icons/high-contrast/catalog.json
@@ -1 +1 @@
-["3g2","3gp","7z","aa","aac","ac","accdb","accdt","ace","adn","ai","aif","aifc","aiff","ait","amr","ani","apk","app","applescript","asax","asc","ascx","asf","ash","ashx","asmx","asp","aspx","asx","au","aup","avi","bmp","bpg","bz2","caf","cr2","csh","dbf","dist","dng","doc","docb","docm","docx","dot","dotm","dotx","eml","exe","flac","gz","heic","iff","image","inc","jar","java","jpe","jpeg","jpg","jsp","jsx","ksh","kt","kts","log","m2v","m3u","m3u8","m4a","m4r","m4v","mc","md","mdb","me","mi","mid","midi","mkv","mo","mod","mov","mp2","mp3","mp4","mpa","mpe","mpeg","mpg","mpga","msg","nef","ogv","pdb","php","pl","png","po","pot","psp","pst","qt","ra","ram","rar","raw","rdf","rdl","resx","rm","rtf","sdf","sit","sql","sqlite","swift","tex","tga","tgz","tif","tiff","txt","vob","war","wav","webm","webp","wma","wmv","wsf","xaml","xml","xps","xsl","xspf","xz","yaml","yml","z","zip","zsh"]
\ No newline at end of file
+["3g2","3gp","7z","aa","aac","ac","accdb","accdt","ace","adn","ai","aif","aifc","aiff","ait","amr","ani","apk","app","applescript","asax","asc","ascx","asf","ash","ashx","asmx","asp","aspx","asx","au","aup","avi","bmp","bpg","bz2","caf","cr2","csh","dbf","dist","dng","doc","docb","docm","docx","dot","dotm","dotx","eml","exe","flac","gz","heic","idx","iff","image","inc","jar","java","jpe","jpeg","jpg","jsp","jsx","ksh","kt","kts","log","m2v","m3u","m3u8","m4a","m4r","m4v","mc","md","mdb","me","mi","mid","midi","mkv","mo","mod","mov","mp2","mp3","mp4","mpa","mpe","mpeg","mpg","mpga","msg","nef","ogv","pdb","php","pl","png","po","pot","psp","pst","qt","ra","ram","rar","raw","rdf","rdl","resx","rm","rtf","sdf","sit","sql","sqlite","swift","tex","tga","tgz","tif","tiff","txt","vob","war","wav","webm","webp","wma","wmv","wsf","xaml","xml","xps","xsl","xspf","xz","yaml","yml","z","zip","zsh"]
\ No newline at end of file
diff --git a/dist/icons/high-contrast/idx.svg b/dist/icons/high-contrast/idx.svg
new file mode 100644
index 0000000..04f38a8
--- /dev/null
+++ b/dist/icons/high-contrast/idx.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path d="M92.5 90.1c0 1.3-1.1 2.4-2.4 2.4H9.9c-1.3 0-2.4-1.1-2.4-2.4V9.9c0-1.3 1.1-2.4 2.4-2.4h80.3c1.3 0 2.4 1.1 2.4 2.4v80.2z" fill="#999"/><path d="M83.1 59.4c0-1.3-1.1-2.4-2.4-2.4H19.3c-1.3 0-2.4 1.1-2.4 2.4V76c0 1.3 1.1 2.4 2.4 2.4h44.9l9.4 9.4v-9.4h7.1c1.3 0 2.4-1.1 2.4-2.4V59.4z" fill="#666"/><path d="M28.8 64.2h7.1v7.1h-7.1v-7.1zm11.8 0h7.1v7.1h-7.1v-7.1zm11.8 0h7.1v7.1h-7.1v-7.1zm11.8 0h7.1v7.1h-7.1v-7.1z" fill="#fafafa"/></svg>
\ No newline at end of file
diff --git a/src/scss/_file-icon-extra-list.scss b/src/scss/_file-icon-extra-list.scss
index 2a07f57..2c8a703 100644
--- a/src/scss/_file-icon-extra-list.scss
+++ b/src/scss/_file-icon-extra-list.scss
@@ -1,3 +1,6 @@
 @include file-family(ext, 1);
-@include file-icon(extra, ext, folder-closed);
+@include file-icon(extra, ext, folder-images);
 @include file-icon(extra, ext, folder-open);
+@include file-icon(extra, ext, folder-photos);
+@include file-icon(extra, ext, folder-tree);
+@include file-icon(extra, ext, folder);
diff --git a/src/scss/_file-icon-high-contrast-list.scss b/src/scss/_file-icon-high-contrast-list.scss
index 9d3be1a..a75ab98 100644
--- a/src/scss/_file-icon-high-contrast-list.scss
+++ b/src/scss/_file-icon-high-contrast-list.scss
@@ -53,6 +53,7 @@
 @include file-icon(high-contrast, hct, flac);
 @include file-icon(high-contrast, hct, gz);
 @include file-icon(high-contrast, hct, heic);
+@include file-icon(high-contrast, hct, idx);
 @include file-icon(high-contrast, hct, iff);
 @include file-icon(high-contrast, hct, image);
 @include file-icon(high-contrast, hct, inc);