Arnold Tutorial - Stylized iridescent shading effect in MtoA — Transcript

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1. 0:03hi Lily Greeks Arnold rendering
2. 0:05specialist start or desk and just want
3. 0:07to cover how to create an iridescent
4. 0:09shading effect in Arnold so I've got a
5. 0:12robot head model here with a default
6. 0:14standard surface Shader assigned to it
7. 0:17I'm going to start off by increasing the
8. 0:19metalness
9. 0:21and then go down to coat increase the
10. 0:24code weight
11. 0:26I want to connect a ramp RGB to the coat
12. 0:29color
13. 0:33and I'm going to change the colors of
14. 0:35the ramp to red green and blue
15. 0:45and get the colors to appear on the the
16. 0:49outer edge grazing angles of the object
17. 0:50need to change the
18. 0:53type of the ramp to custom
19. 0:55and connect to facing ratio to the input
20. 0:59of the ramp
21. 1:01that will give us
22. 1:03the effect that we want
23. 1:09okay so that's the
24. 1:12Grandpa GB going to the Cook color and
25. 1:14the facing ratio going into the ramp by
26. 1:17GB
27. 1:19so now we can use the facing ratio
28. 1:21biasing game
29. 1:23just tweak the effect so lowering the
30. 1:26bias values
31. 1:28slope and knows the overall value so
32. 1:31we're getting more red now as we go
33. 1:33lower values of a crease if we go more
34. 1:35to the blue
35. 1:38and below the game values I kind of just
36. 1:41increases the contrast
37. 1:44effect
38. 1:47is back to 0.5
39. 1:50can also invert the effects so we're
40. 1:52getting bits and center and blue on the
41. 1:54Outer Edge
42. 1:57so if you want to see more of that blue
43. 1:58you can just bring the bytes back down
44. 2:00again
45. 2:01and enabling linear output certainly a
46. 2:04normalized tangle
47. 2:06instead of the end I
48. 2:09to give us even more control we could
49. 2:11use a color correct Shader
50. 2:17and insert that in between the standard
51. 2:19surface Shader and the
52. 2:21rope
53. 2:22show how color to the color
54. 2:26the ramp
55. 2:28put color correct
56. 2:31so now we can use the heat shifter the
57. 2:32color correct cycle
58. 2:3520 colors like so
59. 2:40maybe you want to desaturate the colors
60. 2:43so
61. 2:45and it was a
62. 2:47reduced multiply
63. 2:51or the metal effect
64. 2:57I could also add a noise Shader to the
65. 3:00Hue shift to blend the colors together a
66. 3:02bit more naturally
67. 3:05I'm going to use a cell noise
68. 3:08shift
69. 3:14to increase the number octaves
70. 3:19change the noise doesn't really
71. 3:22two
72. 3:24start to see the colors blending in by
73. 3:27the noise
74. 3:29okay so that's how to use the facing
75. 3:30ratio with the ramp Shader to create a
76. 3:33neurodescent chaining effect in Arnold
77. 3:34thanks for watching and bye for now