diff --git a/codecs/basis/enc/basis_enc.cpp b/codecs/basis/enc/basis_enc.cpp
index 4da04f31..fd4e02ba 100644
--- a/codecs/basis/enc/basis_enc.cpp
+++ b/codecs/basis/enc/basis_enc.cpp
@@ -12,6 +12,8 @@ struct BasisOptions {
   uint8_t compression;
   bool uastc;
   bool mipmap;
+  bool srgb_mipmap;
+  bool perceptual;
 };
 
 thread_local const val Uint8Array = val::global("Uint8Array");
@@ -46,7 +48,10 @@ val encode(std::string image_in, int image_width, int image_height, BasisOptions
   // Needs to be exposed as an option
   params.m_ktx2_uastc_supercompression = basist::KTX2_SS_ZSTANDARD;
 
+  params.m_perceptual = opts.perceptual;
+
   params.m_mip_gen = opts.mipmap;
+  params.m_mip_srgb = opts.srgb_mipmap;
   params.m_mip_filter = "box";
   params.m_quality_level = opts.quality;
   params.m_compression_level = opts.compression;
@@ -74,7 +79,9 @@ EMSCRIPTEN_BINDINGS(my_module) {
       .field("quality", &BasisOptions::quality)
       .field("compression", &BasisOptions::compression)
       .field("uastc", &BasisOptions::uastc)
-      .field("mipmap", &BasisOptions::mipmap);
+      .field("perceptual", &BasisOptions::perceptual)
+      .field("mipmap", &BasisOptions::mipmap)
+      .field("srgb_mipmap", &BasisOptions::srgb_mipmap);
 
   function("encode", &encode);
 }
diff --git a/codecs/basis/enc/basis_enc.d.ts b/codecs/basis/enc/basis_enc.d.ts
index 9f5719cd..d430f663 100644
--- a/codecs/basis/enc/basis_enc.d.ts
+++ b/codecs/basis/enc/basis_enc.d.ts
@@ -3,6 +3,8 @@ export interface EncodeOptions {
   compression: number;
   uastc: boolean;
   mipmap: boolean;
+  srgb_mipmap: boolean;
+  perceptual: boolean;
 }
 
 export interface BasisModule extends EmscriptenWasm.Module {
diff --git a/codecs/basis/enc/basis_enc.js b/codecs/basis/enc/basis_enc.js
index e6f61d60..57bd3b76 100644
--- a/codecs/basis/enc/basis_enc.js
+++ b/codecs/basis/enc/basis_enc.js
@@ -971,9 +971,9 @@ function updateGlobalBufferAndViews(buf) {
   Module['HEAPF64'] = HEAPF64 = new Float64Array(buf);
 }
 
-var STACK_BASE = 5878144,
+var STACK_BASE = 5878176,
     STACKTOP = STACK_BASE,
-    STACK_MAX = 635264;
+    STACK_MAX = 635296;
 
 var TOTAL_STACK = 5242880;
 
diff --git a/codecs/basis/enc/basis_enc.wasm b/codecs/basis/enc/basis_enc.wasm
index f016e033..7aeae8cb 100755
Binary files a/codecs/basis/enc/basis_enc.wasm and b/codecs/basis/enc/basis_enc.wasm differ
diff --git a/src/features/encoders/basis/client/index.tsx b/src/features/encoders/basis/client/index.tsx
index 50f21f68..4f365d45 100644
--- a/src/features/encoders/basis/client/index.tsx
+++ b/src/features/encoders/basis/client/index.tsx
@@ -46,17 +46,16 @@ export class Options extends Component<Props, State> {
     const newOptions: EncodeOptions = {
       // Copy over options the form doesn't currently care about, eg arithmetic
       ...this.props.options,
-      uastc: inputFieldChecked(
-        form.uastc,
-        options.uastc,
-      ),
-      mipmap: inputFieldChecked(
-        form.mipmap,
-        options.mipmap,
-      ),
+      uastc: inputFieldChecked(form.uastc, options.uastc),
+      perceptual: inputFieldChecked(form.perceptual, options.perceptual),
+      mipmap: inputFieldChecked(form.mipmap, options.mipmap),
+      srgb_mipmap: inputFieldChecked(form.srgb_mipmap, options.srgb_mipmap),
       // .value
       quality: inputFieldValueAsNumber(form.quality, options.quality),
-      compression: inputFieldValueAsNumber(form.compression, options.compression),
+      compression: inputFieldValueAsNumber(
+        form.compression,
+        options.compression,
+      ),
     };
     this.props.onChange(newOptions);
   };
@@ -95,25 +94,48 @@ export class Options extends Component<Props, State> {
           />
           Advanced settings
         </label>
-          <Expander>{showAdvanced ? (<div>
-          <label class={style.optionToggle}>
-            UASTC 
-                      <Checkbox
-                        name="uastc"
-                        checked={options.uastc}
-                        onChange={this.onChange}
-                      />
-                    </label>
-          <label class={style.optionToggle}>
-            Embed Mipmaps 
-                      <Checkbox
-                        name="mipmap"
-                        checked={options.mipmap}
-                        onChange={this.onChange}
-                      />
-                    </label>
-
-        </div>) : null}</Expander>
+        <Expander>
+          {showAdvanced ? (
+            <div>
+              <label class={style.optionToggle}>
+                UASTC
+                <Checkbox
+                  name="uastc"
+                  checked={options.uastc}
+                  onChange={this.onChange}
+                />
+              </label>
+              <label class={style.optionToggle}>
+                Perceptual distance metric
+                <Checkbox
+                  name="perceptual"
+                  checked={options.perceptual}
+                  onChange={this.onChange}
+                />
+              </label>
+              <label class={style.optionToggle}>
+                Embed Mipmaps
+                <Checkbox
+                  name="mipmap"
+                  checked={options.mipmap}
+                  onChange={this.onChange}
+                />
+              </label>
+              <Expander>
+                {options.mipmap ? (
+                  <label class={style.optionToggle}>
+                    sRGB Mipmapping
+                    <Checkbox
+                      name="srgb_mipmap"
+                      checked={options.srgb_mipmap}
+                      onChange={this.onChange}
+                    />
+                  </label>
+                ) : null}
+              </Expander>
+            </div>
+          ) : null}
+        </Expander>
       </form>
     );
   }
diff --git a/src/features/encoders/basis/shared/meta.ts b/src/features/encoders/basis/shared/meta.ts
index 295f7eb6..7a30b16d 100644
--- a/src/features/encoders/basis/shared/meta.ts
+++ b/src/features/encoders/basis/shared/meta.ts
@@ -22,4 +22,6 @@ export const defaultOptions: EncodeOptions = {
   compression: 2,
   uastc: false,
   mipmap: false,
+  srgb_mipmap: false,
+  perceptual: true,
 };