Reduce background blur in preview renderer.

Author: oryxel1

core/src/main/java/oxy/bascenario/screens/renderer/element/thingl/PreviewRenderer.java

@@ -96,7 +96,7 @@ protected void renderThinGL() {
     private void renderBackground() {
         if (element.background() != null) {
             ThinGLUtils.renderBackground(Base.instance().assetsManager().texture(scenario.getName(), element.background()), Color.WHITE);
-            ThinGLUtils.blurRectangle(0, 0, 1920, 1080, Math.round(18 * this.globalFade.getValue())); // Very nice blur thanks to ThinGL.
+            ThinGLUtils.blurRectangle(0, 0, 1920, 1080, Math.round(9 * this.globalFade.getValue())); // Very nice blur thanks to ThinGL.
             ThinGL.renderer2D().filledRectangle(GLOBAL_RENDER_STACK, 0, 0, 1920, 1080, Color.fromRGBA(60, 60, 60, Math.round(100 * globalFade.getValue())));
         } else {
             ThinGL.renderer2D().filledRectangle(GLOBAL_RENDER_STACK, 0, 0, 1920, 1080, Color.fromRGBA(22, 23, 26, 255));