YouTube transcript (wo-Ov--FtGk) — Transcript

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1. 0:00I'm BlackGuys, and I believe you can
2. 0:01become a better developer. And in this
3. 0:03video, you'll be learning about UV
4. 0:05unwrapping. We'll be going over what it
5. 0:07is and how to do it. Now, what is UV
6. 0:09unwrapping? Now, when you have a 3D
7. 0:11model, you have to texture it through a
8. 0:122D texture. And through UV unwrapping,
9. 0:15you can translate this face [music]
10. 0:16information to a 2D plane. You do this
11. 0:19through selecting seams that will cut
12. 0:20the faces. Now, a good example is
13. 0:23imagining a shirt. If you cut all the
14. 0:24seams on it and lay it out, that's
15. 0:26basically what UV unwrapping is. Now,
16. 0:28every texture needs seams. And good
17. 0:30seams [music] will make the texture the
18. 0:31same size and won't distort it. And most
19. 0:34of the time, you should place seams in
20. 0:35the breaks of a model. For example,
21. 0:37seams on a shirt or sharp edges. Now, a
22. 0:39general rule is to try to hide your UVs.
23. 0:42This way, you don't have any seam
24. 0:44stretching across an open face of the
25. 0:46model, cuz this can lead to a visible
26. 0:47gaps or edges in a texture. [music] Now,
27. 0:49before we begin, always make sure to
28. 0:51apply the scale to your object. Because
29. 0:53if [music] you have multiple objects,
30. 0:55this can lead to uneven UVs, which is
31. 0:57not good. Anyways, let's get to my
32. 0:59workflow for UV unwrapping. Okay, so I
33. 1:01have this model here, and I want to UV
34. 1:03unwrap it. So, what I usually start with
35. 1:06is to go into [music] the UV editing
36. 1:07tab. Select new. You can rename this to
37. 1:10whatever you want. I'll just rename this
38. 1:11to
39. 1:12uh UV grid. Then, it's usually generated
40. 1:16blank by default, so you [music] want to
41. 1:18set it to UV grid. Then, just click new
42. 1:20image. And then, here it is.
43. 1:22And you go into the shading tab.
44. 1:25Select your model.
45. 1:27Import an image texture.
46. 1:31Find that UV grid we just saved. Plug it
47. 1:33into the base color.
48. 1:34And now, we have a UV grid. But, as you
49. 1:37can probably tell, it's slightly messed
50. 1:38up.
51. 1:39So, head back to the layout tab. Go into
52. 1:42material view.
53. 1:43And now, it's time to UV unwrap this.
54. 1:46What I always tend to do [music] is just
55. 1:49start by marking uh seams on all of the
56. 1:52sharp faces.
57. 1:53>> [music]
58. 1:53>> So, basically, anything that has a 90°
59. 1:55angle, I'll put a seam there. And I also
60. 1:57tend to change it to different textures
61. 2:01so I can see the red UV lines. A fast
62. 2:04way you can do this is go to select
63. 2:06sharp edges, crank this up a lot, let's
64. 2:09do [music] like 89, and then just mark
65. 2:11seam.
66. 2:13There we go.
67. 2:14We unwrap [music] angle based. You can
68. 2:17already tell it's slightly better. If
69. 2:19you look right here, you can see it's
70. 2:20distorted, which is exactly what you
71. 2:22don't want. So, what we need to do add a
72. 2:25seam like right here, unselect that,
73. 2:27mark seam.
74. 2:29I would mark seam right here, too. Okay,
75. 2:32now let's unwrap again.
76. 2:34Okay, nice. It's basically unwrapped
77. 2:36already.
78. 2:37Let's go to the UV editing tab and see
79. 2:39our UVs. You can highlight everything to
80. 2:41see it better. Now it's filling up a
81. 2:43decent amount of the grid, but there's
82. 2:45still a lot of gaps.
83. 2:46>> [music]
84. 2:46>> And if you're working with like a 1K
85. 2:48texture for performance, you really want
86. 2:49to fill this up as much as you can. So,
87. 2:51[music] I might go around adding a
88. 2:53couple more seams so it can be a tighter
89. 2:56unwrap. And usually with curves, it has
90. 2:58a whole lot of empty space. So,
91. 3:00sometimes you'll want to unwrap. Now,
92. 3:03only do this if you really have to
93. 3:05because you can easily get these ugly
94. 3:07uh texture areas where you can clearly
95. 3:09see the line. And that's [music] pretty
96. 3:10bad because if you don't correctly
97. 3:12texture it, it'll look really ugly and
98. 3:14it'll probably just ruin the complete
99. 3:16texture. So, only do that if you really
100. 3:18have to. Uh there's still a weird slice
101. 3:21right [music] here. So, a good way to
102. 3:23find things is just highlight it here,
103. 3:25move it around, and you can see it
104. 3:26moving here. Now I know that I need to
105. 3:29edit this. Find out where, I think right
106. 3:31there. [music] Since there's no edge
107. 3:34right here that I can select to add a
108. 3:35seam, I'll just
109. 3:37create my own
110. 3:40by pressing J and then marking that seam
111. 3:41there. That way it splits it up a little
112. 3:43better. Now, the smaller the grid, the
113. 3:45more high-quality the texture will be.
114. 3:47That's why I'm just going in, selecting
115. 3:50some extra extra edges to add seams
116. 3:52[music] to, so the unwrap will be
117. 3:54tighter. But again, you don't need to do
118. 3:56this if you're working with like 2K or
119. 3:594K textures. It's better to have cleaner
120. 4:01seams where it's not blatantly going
121. 4:03across the model.
122. 4:05But since I [music] work mainly with 1K
123. 4:07textures, I'm just doing this to
124. 4:09optimize it further. Now this this is a
125. 4:11pretty good UV. It's pretty compact.
126. 4:14>> [music]
127. 4:14>> If you look here, there's no distortion
128. 4:16and now it's basically ready to be taken
129. 4:18into Substance Painter and texture it or
130. 4:20to texture it in whatever program you
131. 4:22use. Okay, tutorial over. If you found
132. 4:25it helpful, then like and subscribe. I
133. 4:26post development and modeling guides
134. 4:28every couple of days. If you have any
135. 4:30questions, then comment and I'll try to
136. 4:31answer as quick as I can. Goodbye now.