diff --git a/build.gradle.kts b/build.gradle.kts
index a8d57674..61a73e71 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,8 +1,8 @@
-val dataforgeVersion by extra("0.1.4")
+val dataforgeVersion by extra("0.1.5-dev-4")
 
 plugins {
-    val kotlinVersion = "1.3.50"
-    val toolsVersion = "0.2.2"
+    val kotlinVersion = "1.3.61"
+    val toolsVersion = "0.2.7"
 
     kotlin("jvm") version kotlinVersion apply false
     id("kotlin-dce-js") version kotlinVersion apply false
diff --git a/dataforge-vis-common/build.gradle.kts b/dataforge-vis-common/build.gradle.kts
index 669fd43f..aff8d7a0 100644
--- a/dataforge-vis-common/build.gradle.kts
+++ b/dataforge-vis-common/build.gradle.kts
@@ -33,7 +33,6 @@ kotlin {
             dependencies {
                 api("hep.dataforge:dataforge-output-html:$dataforgeVersion")
                 api("kotlin.js.externals:kotlin-js-jquery:3.2.0-0")
-                api(npm("text-encoding"))
                 api(npm("bootstrap","4.3.1"))
             }
         }
diff --git a/dataforge-vis-spatial-gdml/build.gradle.kts b/dataforge-vis-spatial-gdml/build.gradle.kts
index d02c8258..31c0f223 100644
--- a/dataforge-vis-spatial-gdml/build.gradle.kts
+++ b/dataforge-vis-spatial-gdml/build.gradle.kts
@@ -13,7 +13,7 @@ kotlin {
         val commonMain by getting {
             dependencies {
                 api(project(":dataforge-vis-spatial"))
-                api("scientifik:gdml:0.1.4")
+                api("scientifik:gdml:0.1.3")
             }
         }
         val jsMain by getting {
diff --git a/dataforge-vis-spatial-gdml/src/jvmMain/kotlin/hep/dataforge/vis/spatial/gdml/generateSchema.kt b/dataforge-vis-spatial-gdml/src/jvmMain/kotlin/hep/dataforge/vis/spatial/gdml/generateSchema.kt
index fc417efb..628a8651 100644
--- a/dataforge-vis-spatial-gdml/src/jvmMain/kotlin/hep/dataforge/vis/spatial/gdml/generateSchema.kt
+++ b/dataforge-vis-spatial-gdml/src/jvmMain/kotlin/hep/dataforge/vis/spatial/gdml/generateSchema.kt
@@ -73,7 +73,7 @@ private fun jsonSchema(descriptor: SerialDescriptor, context: SerialModule): Jso
     val properties: MutableMap<String, JsonObject> = mutableMapOf()
     val requiredProperties: MutableSet<String> = mutableSetOf()
     val isEnum = descriptor.kind == UnionKind.ENUM_KIND
-    val isPolymorphic = descriptor.kind == UnionKind.POLYMORPHIC
+    val isPolymorphic = descriptor.kind is PolymorphicKind
 
 
     if (!isEnum && !isPolymorphic) descriptor.elementDescriptors().forEachIndexed { index, child ->
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
index 6992e0ec..7d2a2cac 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
@@ -6,7 +6,7 @@ import hep.dataforge.io.serialization.NameSerializer
 import hep.dataforge.meta.*
 import hep.dataforge.names.asName
 import hep.dataforge.names.plus
-import hep.dataforge.output.Output
+import hep.dataforge.output.Renderer
 import hep.dataforge.vis.common.VisualObject
 import hep.dataforge.vis.spatial.VisualObject3D.Companion.DETAIL_KEY
 import hep.dataforge.vis.spatial.VisualObject3D.Companion.IGNORE_KEY
@@ -77,7 +77,7 @@ var VisualObject3D.layer: Int
         setProperty(LAYER_KEY, value)
     }
 
-fun Output<VisualObject3D>.render(meta: Meta = EmptyMeta, action: VisualGroup3D.() -> Unit) =
+fun Renderer<VisualObject3D>.render(meta: Meta = EmptyMeta, action: VisualGroup3D.() -> Unit) =
     render(VisualGroup3D().apply(action), meta)
 
 // Common properties
diff --git a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeOutput.kt b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeOutput.kt
index 1dd74ca3..0ea8989f 100644
--- a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeOutput.kt
+++ b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeOutput.kt
@@ -2,7 +2,7 @@ package hep.dataforge.vis.spatial.three
 
 import hep.dataforge.context.Context
 import hep.dataforge.meta.*
-import hep.dataforge.output.Output
+import hep.dataforge.output.Renderer
 import hep.dataforge.vis.common.Colors
 import hep.dataforge.vis.spatial.VisualObject3D
 import hep.dataforge.vis.spatial.World
@@ -19,7 +19,7 @@ import kotlin.browser.window
 import kotlin.dom.clear
 import kotlin.math.max
 
-class ThreeOutput(val three: ThreePlugin, val meta: Meta = EmptyMeta) : Output<VisualObject3D> {
+class ThreeOutput(val three: ThreePlugin, val meta: Meta = EmptyMeta) : Renderer<VisualObject3D> {
 
     override val context: Context get() = three.context
 
diff --git a/dataforge-vis-spatial/src/jvmMain/kotlin/hep/dataforge/vis/spatial/fx/FX3DOutput.kt b/dataforge-vis-spatial/src/jvmMain/kotlin/hep/dataforge/vis/spatial/fx/FX3DOutput.kt
index b910b17e..7497ead5 100644
--- a/dataforge-vis-spatial/src/jvmMain/kotlin/hep/dataforge/vis/spatial/fx/FX3DOutput.kt
+++ b/dataforge-vis-spatial/src/jvmMain/kotlin/hep/dataforge/vis/spatial/fx/FX3DOutput.kt
@@ -2,7 +2,7 @@ package hep.dataforge.vis.spatial.fx
 
 import hep.dataforge.context.Context
 import hep.dataforge.meta.Meta
-import hep.dataforge.output.Output
+import hep.dataforge.output.Renderer
 import hep.dataforge.vis.common.VisualObject
 import hep.dataforge.vis.spatial.Box
 import hep.dataforge.vis.spatial.VisualGroup3D
@@ -15,7 +15,7 @@ import tornadofx.*
  * https://github.com/miho/JCSG for operations
  *
  */
-class FX3DOutput(override val context: Context) : Output<VisualObject> {
+class FX3DOutput(override val context: Context) : Renderer<VisualObject> {
     val canvas by lazy { Canvas3D() }
 
 
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 5c2d1cf0..cc4fdc29 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 7c4388a9..94920145 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 83f2acfd..2fe81a7d 100644
--- a/gradlew
+++ b/gradlew
@@ -154,19 +154,19 @@ if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -175,14 +175,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/settings.gradle.kts b/settings.gradle.kts
index b49736d1..f3511af6 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -13,12 +13,7 @@ pluginManagement {
     resolutionStrategy {
         eachPlugin {
             when (requested.id.id) {
-                "kotlinx-atomicfu" -> useModule("org.jetbrains.kotlinx:atomicfu-gradle-plugin:${requested.version}")
-                "kotlin-multiplatform" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
-                "org.jetbrains.kotlin.jvm" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
-                "org.jetbrains.kotlin.js" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
                 "kotlin-dce-js" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
-                "org.jetbrains.kotlin.frontend" -> useModule("org.jetbrains.kotlin:kotlin-frontend-plugin:${requested.version}")
                 "scientifik.mpp", "scientifik.publish", "scientifik.jvm", "scientifik.js" -> useModule("scientifik:gradle-tools:${requested.version}")
                 "org.openjfx.javafxplugin" -> useModule("org.openjfx:javafx-plugin:${requested.version}")
             }
@@ -26,7 +21,7 @@ pluginManagement {
     }
 }
 
-enableFeaturePreview("GRADLE_METADATA")
+//enableFeaturePreview("GRADLE_METADATA")
 
 rootProject.name = "dataforge-vis"
 
diff --git a/spatial-js-demo/build.gradle.kts b/spatial-js-demo/build.gradle.kts
index 53f185b2..19b614fd 100644
--- a/spatial-js-demo/build.gradle.kts
+++ b/spatial-js-demo/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
 
 dependencies {
     api(project(":dataforge-vis-spatial"))
-    testCompile(kotlin("test-js"))
+    testImplementation(kotlin("test-js"))
 }
 
 //kotlin{