lookdev: Update APIs.

Author: freezy

LookDev~/Assets/Runtime/ThumbGenerator.cs

@@ -74,7 +74,7 @@ public void StartProcessing(bool newOnly = false, bool selectedOnly = false)
 				}
 
 				_combinations = new List<AssetMaterialCombination>(assets
-					.SelectMany(a => AssetMaterialCombination.GetCombinations(a.Asset, true))
+					.SelectMany(a => a.Asset.GetCombinations(true, true, false))
 				);
 
 				if (newOnly) {
@@ -171,7 +171,7 @@ private AssetMaterialCombination NextAsset()
 				return null;
 			}
 			var next = _combinations.First();
-			if (next.HasDuplicateVariations) {
+			if (!next.IsValidCombination) {
 				_combinations.RemoveAt(0);
 				return NextAsset();
 			}

LookDev~/Assets/Runtime/ThumbGeneratorComponent.cs

@@ -36,7 +36,7 @@ public class ThumbGeneratorComponent : MonoBehaviour
 		public string ThumbnailGuid;
 		public string ThumbnailRoot;
 
-		private const int NumPreFrames = 40;
+		private const int NumPreFrames = 120;
 		private const int NumPostFrames = 20;
 		private int _frame;