【Unite 2018 Tokyo】プログレッシブライトマッパーの真価を発揮する秘訣
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講演者：Ciro Continisio(Unity Technologies) こんな人におすすめ ・アーティスト ・グラフィックデザイナー ・セットのライティングに携わる開発者 受講者が得られる知見 ・Enlighten上のプログレッシブライトマッパーが提供する機能とその強み ・多数のオプションを制御して理想のライティング結果を表現する方法
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【Unite 2018 Tokyo】プログレッシブライトマッパーの真価を発揮する秘訣
- 2. Ciro Continisio Technical Evangelist Unity Technologies
- 4. Progressive Lightmapper Introduced in 5.6 - Now feature complete
- 6. Progressive Lightmapper Soft shadows Area lights and emissive
- 9. Prioritize View • Will start baking what is framed in the Scene View first • Once it’s done, it will bake the rest
- 12. Force Stop
- 13. Force Stop • Gathers all the data baked so far, and finalises it • Filtering • Baking light probes and reflection probes • If you bake again, Unity resumes where you left!
- 15. Samples and Lightmap Resolution
- 16. Texel Resolution • Start with a very low resolution to iterate quickly (10-15) • Don’t inspect the game with the eyes of a creator… • … but think of how the player will see it! • You always need a lower resolution than you think!
- 17. Texel Resolution
- 18. Texel Resolution per object Higher res in foreground Very low res in background Per object (or prefab)
- 19. Samples • Each texel will shoot these many samples
- 21. Indirect Samples Bounces x times EmittedFinds skybox
- 22. Light Bounces
- 23. Light bounces Even softer shadows Light recessesDark areas
- 24. How many bounces? 1 Bounce 3 min 2 Bounces 5 min
- 25. Filtering
- 26. Filtering Filtering is an operation that smooths out the result of the bake. • Happens after the bake • Happens even if Force Stop is pressed • Can be None, Auto or Advanced • If you want to change filtering, you don’t need to bake again!
- 27. Filtering Samples 10/300 - No filtering 3:48 Samples 3/100 - Advanced filtering 1:45
- 28. • In Advanced: choose between Gaussian and the new A-Trous • Gaussian smooths A LOT • A-Trous is edge-aware: preserves hard edges and AO better Filtering
- 30. UV Charts
- 31. UV Charts Objects are broken down into charts, based on their normals. • Created when the bake starts, based on the normals of the object • NOT the same as the ones used by Enlighten for Realtime GI!
- 32. UV Charts
- 33. UV Charts Limits of filtering
- 34. UV Charts • You can redo your normals in your modelling package • Or ask Unity to generate them:
- 35. UV Charts
- 36. Light Probes
- 37. Light Probes • They allow to capture baked lights to be used for moving objects • Lay them out in pyramids
- 38. Light Probes usage Dark areas Area lights and emissives Coloured lights
- 42. Mixed Modes
- 43. Mixed Modes Mixed Lighting is not an option you turn on/off. Choose the type: • Baked Indirect • Shadowmask • Subtractive And then use lights marked as Mixed.
- 44. Subtractive • Cheapest of all, but least appealing
- 45. Baked Indirect • Bakes indirect light, rest is realtime. CPU expensive, but dynamic
- 46. Shadowmask • Most lighting is baked into lightmaps. Cheap and flexible.
- 47. Distance Shadowmask • Realtime shadows up close, baked in big environments
- 48. Various Tips
- 49. Compression settings • Iterate faster by keeping probes and lightmaps uncompressed • Once you are happy with your bake, compress them again
- 50. Fixing seams Irregular lighting on a surface, or between adjacent objects which should be parallel • They can be particularly annoying in modular 3D art • Seams can depend on many factors
- 51. Seams ???
- 52. Seams
- 53. Vertex normals
- 54. UV overlapping
- 56. Thank you! Ciro Continisio @CiroContns connect.unity.com/u/Ciro Technical Evangelist Unity Technologies