Clean Up AI 3D Models Like a Pro | Blender Tutorial 2025 #tutorial #blender — Transcript

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1. 0:00Hey guys, in this one, I'm going to show
2. 0:02you how I simplified this AI generated
3. 0:04model I made with Mesh AI into something
4. 0:07much more clean and organized. So, you
5. 0:10can use the same trick for any complex
6. 0:12model. So, make sure to stick around
7. 0:14till the end. So guys, before jumping
8. 0:17into the Mesh AI tool, I just created
9. 0:19these three images using Gemini. You can
10. 0:22just use text prompt or something else.
11. 0:26But I created these three different
12. 0:28images of the same girl from different
13. 0:30perspective
14. 0:31for ease of use, but you can definitely
15. 0:34use a one reference image. Right, here's
16. 0:36the site. You can Google it like Mesh
17. 0:39AI.
18. 0:42So, you can see
19. 0:43here we have image to 3D and text to 3D
20. 0:46options and some couple of other options
21. 0:48as well. And also, you can select the
22. 0:51image to 3D right up here as well.
23. 0:53So, selecting that, it brings us to this
24. 0:56window.
25. 0:58All right, guys. Here's the place we are
26. 0:59going to create our model.
27. 1:02Right here, you can put your reference
28. 1:03image.
29. 1:05And down below, you can see the AI
30. 1:07model. So, I have to make sure that you
31. 1:09select the the lease model, which is
32. 1:11called AI model four. Otherwise, you
33. 1:14won't be able to download your model.
34. 1:16And then I'm going to open my image and
35. 1:19I'm going to open my side image. Make
36. 1:22sure that you are selecting a side view,
37. 1:25not a front or back side view.
38. 1:27So, then you can type in a name,
39. 1:29something It doesn't matter actually.
40. 1:31So, I'm going to type girl and hit
41. 1:33generate.
42. 1:34So, and then you can see that the model
43. 1:37is being generated right here. And I'll
44. 1:39open
45. 1:41I'll open the generated one. So, here's
46. 1:43the result. So, seems pretty fine.
47. 1:46Actually, we can see some of the
48. 1:48textures are a little bit awkward, like
49. 1:50the hands are on the shirt on the dress
50. 1:53of the girl. And but it's pretty much uh
51. 1:57But overall it's nice.
52. 1:59So then I can come down here and hit
53. 2:01this little download button. And where
54. 2:03you can select the format. The format we
55. 2:06have couple of other formats, but I much
56. 2:09prefer to use blend file.
57. 2:11So I'll select the blend file and hit
58. 2:12download.
59. 2:14So here's the file, guys.
60. 2:17Let me open the file first.
61. 2:21So I'll turn on the shading viewport in
62. 2:23order to see our textures. And you can
63. 2:25see that it's really nice. Our textures
64. 2:28also come along with the blend file. And
65. 2:30also I'll turn on the statistics there.
66. 2:32You can see how much of vertices or
67. 2:34triangles the model has. And also if I
68. 2:37turn on the wireframe mode, you can see
69. 2:39how much of messy the model is. All
70. 2:42right? You can see lots of triangles. So
71. 2:45let's see
72. 2:47how to reduce the polygon count for this
73. 2:48model.
74. 2:49So I'm going to teach you guys two
75. 2:51different methods. The first one we're
76. 2:53going to use decimate modifier. So if
77. 2:55you want a fast solution for your model,
78. 2:58I highly recommend the decimate
79. 3:00modifier.
80. 3:01But if you want more clean mesh, I
81. 3:04highly recommend my second method which
82. 3:06is called the the remesh method or the
83. 3:10the voxel method, let's say. I don't
84. 3:13know how to pronounce that word, but
85. 3:16we're going to see in a minute. So
86. 3:18before diving into the process, I just
87. 3:20copied my model a couple of time
88. 3:23and named them high poly and low poly
89. 3:27because actually we going to want to
90. 3:28need the high poly one at the end of the
91. 3:30video. All right, let's apply our
92. 3:33decimate modifier. So you can find the
93. 3:35decimate modifier under the generate and
94. 3:38decimate. So here's a decimate modifier
95. 3:41and you can see three options under the
96. 3:43decimate modifier. Planar, unsubdivided,
97. 3:45and collapse. If you go into select the
98. 3:48planar, you can instantly see some
99. 3:50modification on the texture. If if turn
100. 3:52on the wireframe mode, you can see guys
101. 3:55um
102. 3:56um you know, weird. The triangles count
103. 3:58actually has reduced. Uh we have also a
104. 4:01unsubdivided. You can tweak the value
105. 4:02and check it out. Uh but I'm going to
106. 4:04use collapse actually for this one. So,
107. 4:06if you reduce the ratio under the
108. 4:08collapse, you can instantly see the
109. 4:10difference um you know, going on the
110. 4:12triangle count is going down. Um let me
111. 4:15type something like 0.05
112. 4:18maybe.
113. 4:22Now, we can see the mesh um actually
114. 4:26um
115. 4:27which is really really good because we
116. 4:29cannot see any texture issues or
117. 4:31anything else.
118. 4:32And if I go a little bit
119. 4:35uh more like 0.01 maybe, still it's
120. 4:38pretty fine though.
121. 4:40It's fine and
122. 4:41you can see some of the you know, boxy
123. 4:43shapes uh around the mesh, but the the
124. 4:46vortex um
125. 4:48the mesh is fine.
126. 4:50No texture issues, no anything else.
127. 4:53So, I'm going to apply the decimate
128. 4:54modifier. And if you go into the edit
129. 4:56mode, you can clearly see everything now
130. 4:59is clean. But um actually that is you
131. 5:02know, it's still that those are
132. 5:03triangulated. Uh you cannot uh create
133. 5:06you know, good animations with this
134. 5:08model. By the way, um
135. 5:10so with that being set up, um let's talk
136. 5:13about the sculpting method, the second
137. 5:16one.
138. 5:17So, let's uh get into the sculpting
139. 5:20tool. Sculpting tool can be found at top
140. 5:22of the blender.
141. 5:24So, I'll turn on the um
142. 5:26texture viewports. And also I will turn
143. 5:30on my um wireframe.
144. 5:33So, you can clearly see what what's
145. 5:34going on. So, um under the remesh at the
146. 5:36top, you can see a something called
147. 5:38voxel size and adaptivity, which are the
148. 5:40settings we're going to use here. So, if
149. 5:43you hold on the Alt key on the keyboard,
150. 5:44you You see a grid like this. And then
151. 5:47you can move your mouse here and there
152. 5:49to resize the voxels. So, I'm going to
153. 5:51set up like 0.02 and control R to apply
154. 5:55it. The result is really nice because
155. 5:57you can see the the cords
156. 5:59right now. And real quick thing, you can
157. 6:03notice that our textures are gone,
158. 6:05right? You can see clearly that the
159. 6:07textures we have some weird lines all
160. 6:09over the the mesh. So, I have to fix
161. 6:12that right now. So, let me turn off my
162. 6:17low poly one and then turn on my high
163. 6:19poly one because I want to show you
164. 6:21something um
165. 6:23because I want to show you the the UV
166. 6:24editing right here. So, this is my Let
167. 6:27me jump into the object mode and
168. 6:30enable the textures.
169. 6:33On the right-hand side, you can see,
170. 6:34guys, this is the texture that came
171. 6:36along the AI tool, right? Which is
172. 6:38really nice actually. If you split the
173. 6:41display on the left-hand side and then
174. 6:45I can add the shader editor, so you can
175. 6:47clearly see my material on the high poly
176. 6:50model. So, we have a texture material,
177. 6:52which is the texture down below, and we
178. 6:55have the principal BSDF.
179. 6:58So, this is my low poly one. We have the
180. 7:01same material, we have the same
181. 7:02textures, and everything is same for the
182. 7:05low poly one as well. So, that's why we
183. 7:06have to change our UV settings to
184. 7:10create things from the scratch. What you
185. 7:12have to do is simply
186. 7:14you go into the data properties and
187. 7:16under the UV maps, you can see
188. 7:18something called UV map, which is a UV
189. 7:20map of this model, right? I'm going to
190. 7:23remove that, and then I'm going to
191. 7:24create a new one UV map, and then also
192. 7:27I'll delete my current texture, and also
193. 7:30I'm going to add in a new texture, type
194. 7:32in some name, and for the width and
195. 7:35height, the resolution like 2K maybe. It
196. 7:38It is not necessary to be 2K. You can go
197. 7:40for 4K or anything less and then create
198. 7:44a new image.
199. 7:46Right here and also I'm going to create
200. 7:47a new material for my um low remesh.
201. 7:51So, I can write down the name
202. 7:53something here.
203. 7:56Um and then we are going to add a new
204. 7:59image texture.
205. 8:00Also, you can get the same menu um
206. 8:03holding down the shift key and A key on
207. 8:06the keyboard.
208. 8:07And we're going to go connect the color
209. 8:10node to the base color of the principal
210. 8:12BSDF.
211. 8:13And then we can select our created new
212. 8:16texture
213. 8:17under this drop-down menu.
214. 8:19All right. Now, since the texture is
215. 8:22black, we have no anything to see on the
216. 8:25the material.
217. 8:27Then I'm going to go into the edit mode
218. 8:29and select the the model.
219. 8:33And then U to unwrap
220. 8:35and a smart UV project.
221. 8:37And there we have island margin um we
222. 8:39can type in something like 0.02
223. 8:42and then hit okay.
224. 8:44So, you can see that the new UV map
225. 8:46right here.
226. 8:48Then you can go into the object mode and
227. 8:51then I'm going to turn on my high poly
228. 8:53one.
229. 8:54Right? Because we want to get our
230. 8:56material data from the high poly to the
231. 8:59low poly one.
232. 9:00Right. Uh one thing you have to keep in
233. 9:02mind that um our low poly and high poly
234. 9:04models should be at the same spot. You
235. 9:06can check out the transform information
236. 9:09um on the right hand corner. You can get
237. 9:11it hitting the N key on the keyboard and
238. 9:14you have to make sure everything is um
239. 9:16as this. If everything is um as this,
240. 9:19you can select the high poly one first
241. 9:21and then low poly one. You should um
242. 9:24keep the low poly one as the activated
243. 9:26object. And then you have to select the
244. 9:28UV map of the low poly one
245. 9:31and then the new texture of the
246. 9:33material.
247. 9:34The image texture you have to select the
248. 9:36image texture of the low poly one.
249. 9:38Have to make sure the high poly one uh
250. 9:39is selected and also the low poly one
251. 9:41selected and the low poly one is the
252. 9:43activated one and then you remap be
253. 9:45selected. And then we're going to go
254. 9:46into the render properties and we have
255. 9:48to select the render engine to cycles
256. 9:51and then we're going to go jump into the
257. 9:53bake option, right? Under the bake
258. 9:55option, you can see something called a
259. 9:57selected to active. I have to check it.
260. 10:02And then you have to go into the bake
261. 10:04type. Under that, you have to select the
262. 10:06diffuse because we are going to bake out
263. 10:09all of the color data.
264. 10:11And under the influence, I have to
265. 10:12deselect the direct and indirect because
266. 10:15those are the light
267. 10:16data actually. So, you don't want to
268. 10:19bake out the light data. We only want
269. 10:22the color data, right?
270. 10:24And also, I'm going to reduce the margin
271. 10:27size. It is not really needed, but I'm
272. 10:30going to type in something 10 or
273. 10:32something. It's not a big deal. So, you
274. 10:34can type in 16. You can keep the 16.
275. 10:36Anyways, if everything is fine, like I
276. 10:39have to double check everything is
277. 10:40selected and then hit the bake under the
278. 10:42bake.
279. 10:43Right? After that, you can see a texture
280. 10:45baking
281. 10:47at the bottom of the blender.
282. 10:49And
283. 10:50so, the baking is done. Right? You can
284. 10:53see some weird texturing like the faces
285. 10:57and everything. If I go into the bake,
286. 10:59so if I see the model, you can see
287. 11:01something is off, right? So, what's the
288. 11:04problem here?
289. 11:05So, the problem, if you go into the
290. 11:07render properties again, you can see
291. 11:09something under the selected to active
292. 11:11option and there's a extrusion option,
293. 11:14right? The extrusion is something as I
294. 11:17have to type in something like 0.05.
295. 11:19What does it all mean? It's simply that
296. 11:21the high poly one is trying to cast all
297. 11:23this color data towards the low poly
298. 11:25one, but the problem is the high poly
299. 11:27and the low poly one, the models are
300. 11:29exactly at the same spot and exactly in
301. 11:32the same size. So, I have to get a
302. 11:34little bit of margin to the high poly
303. 11:36one. Since we have added like 0.05 m,
304. 11:39that casting happens a little bit above
305. 11:43or little bit outside of the low poly
306. 11:44one. And if I bake it again,
307. 11:48Okay, finally, we can see uh our texture
308. 11:51is fixed. Now, if you turn off the high
309. 11:54poly one, this is the low poly one
310. 11:55actually. This is the new texture we
311. 11:57have created from our high poly one. Uh
312. 11:59right now, you cannot see any weird uh
313. 12:02texture um other than the the something
314. 12:04some artifacts that came along the um
315. 12:07mesh actually. So, everything is fine as
316. 12:10the high poly one. So, you can if I turn
317. 12:12on the wireframe mode, you can see quad
318. 12:14base clean mesh.
319. 12:16Um and also uh the texture is really
320. 12:19nice.
321. 12:20Um yeah. So, that's it, guys.
322. 12:23Um
323. 12:24I also tried some uh of the animation um
324. 12:27using this exact uh model. You can check
325. 12:30it out right here. So, I think um that
326. 12:33is the end of the video. Um