diff --git a/tools/tungsten/core/src/com/google/android/filament/tungsten/ui/preview/Ibl.kt b/tools/tungsten/core/src/com/google/android/filament/tungsten/ui/preview/Ibl.kt
index 7c9e04c494..9bd8c8d41d 100644
--- a/tools/tungsten/core/src/com/google/android/filament/tungsten/ui/preview/Ibl.kt
+++ b/tools/tungsten/core/src/com/google/android/filament/tungsten/ui/preview/Ibl.kt
@@ -121,7 +121,7 @@ internal class Ibl(val engine: Engine, private val pathPrefix: String) {
         buffer.position(0)
 
         val bufferDescriptor =
-                Texture.PixelBufferDescriptor(buffer, Texture.Format.RGB, Texture.Type.UBYTE)
+                Texture.PixelBufferDescriptor(buffer, Texture.Format.RGB, Texture.Type.UINT_10F_11F_11F_REV)
 
         // If the texture hasn't been created yet, create it.
         val resultTexture = texture ?: Texture.Builder()
diff --git a/tools/tungsten/gradle/wrapper/gradle-wrapper.properties b/tools/tungsten/gradle/wrapper/gradle-wrapper.properties
index cd779a7f2e..ae45383b6d 100644
--- a/tools/tungsten/gradle/wrapper/gradle-wrapper.properties
+++ b/tools/tungsten/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Wed May 16 19:09:57 PDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip