update to Filament libs with inverse bind matrices

ios/include/filament/Renderer.h

@@ -117,15 +117,37 @@ public:
      * ClearOptions are used at the beginning of a frame to clear or retain the SwapChain content.
      */
     struct ClearOptions {
-        /** Color to use to clear the SwapChain */
+        /**
+         * Color (sRGB linear) to use to clear the RenderTarget (typically the SwapChain).
+         *
+         * The RenderTarget is cleared using this color, which won't be tone-mapped since
+         * tone-mapping is part of View rendering (this is not).
+         *
+         * When a View is rendered, there are 3 scenarios to consider:
+         * - Pixels rendered by the View replace the clear color (or blend with it in
+         *   `BlendMode::TRANSLUCENT` mode).
+         *
+         * - With blending mode set to `BlendMode::TRANSLUCENT`, Pixels untouched by the View
+         *   are considered fulling transparent and let the clear color show through.
+         *
+         * - With blending mode set to `BlendMode::OPAQUE`, Pixels untouched by the View
+         *   are set to the clear color. However, because it is now used in the context of a View,
+         *   it will go through the post-processing stage, which includes tone-mapping.
+         *
+         * For consistency, it is recommended to always use a Skybox to clear an opaque View's
+         * background, or to use black or fully-transparent (i.e. {0,0,0,0}) as the clear color.
+         */
         math::float4 clearColor = {};
+
         /** Value to clear the stencil buffer */
         uint8_t clearStencil = 0u;
+
         /**
          * Whether the SwapChain should be cleared using the clearColor. Use this if translucent
          * View will be drawn, for instance.
          */
         bool clear = false;
+
         /**
          * Whether the SwapChain content should be discarded. clear implies discard. Set this
          * to false (along with clear to false as well) if the SwapChain already has content that