message: SamplerType JNI definition was out of step with the native definition.
  When invoking MaterialBuilder.samplerParameter with Java enum SAMPLER_EXTERNAL it was wrongly recast as native enum SAMPLE_CUBEMAP in the JNI interface because the Java enum was missing SAMPLE_2D_ARRAY.
diff: @@ -66,6 +66,7 @@ public class MaterialBuilder {
  public enum SamplerType {
  SAMPLER_2D, // 2D texture
  + SAMPLER_2D_ARRAY, // 2D array texture
  SAMPLER_CUBEMAP, // Cube map texture
  SAMPLER_EXTERNAL, // External texture
  }
  