Hi-Poly Photogrammetry to Low-Poly | Blender Beginner Tutorial

This Blender tutorial will shows you how to transform a high-resolution photogrammetry Building model scan into a low-poly, editable model. Photogrammetry is the process of using images to build 3D model, and it is a potent process for collecting accurate, realistic models of real-world items. However, working with these models in Blender can be challenging and complex, particularly when making modifications or alterations. This Blender tutorial will teach you a simple and quick method on how to cleanup and re-topologies a complex model. A Blender beginner tutorial
With the help of this tutorial, you will learn how to reduce a high-resolution photogrammetry building model into a low-poly model that is much simpler and easy to edit and use. The method outlined in this tutorial will also result not only in a small, game-ready model, but will also retain the fine details of the original hi-res model. We'll go through the fundamentals of utilising Blender to lessen a model's polygon count as well as methods for making the model more suitable for use in real-time.
Additionally, Blender's diffuse and normal map baking will be covered in the tutorial. The process of baking involves transferring high-resolution information from a photogrammetry model to a low-poly one. The low-poly model will appear more realistic since diffuse maps hold the colour information of the model and normal maps store surface data like bumps and grooves.
Anyone interested in low-poly modelling, photogrammetry, or using Blender to reduce hi-poly models should definitely check out this tutorial. It's also excellent for anyone interested in finding out more about how to develop models that are prepared for usage in interactive games or other applications. You will be able to utilise the knowledge you gain from this lesson to easily generate your own building/hard-surface models once you have a firm understanding of how to convert high-resolution photogrammetry models into low-poly models.
CONTENT OF THIS VIDEO TUTORIAL
0:00 Intro
0:30 Importing / Loading 3D Scan in Blender
1:11 Convert to Low-Poly Model
13:20 'Bake' Explanation
14:35 Unwrap Low-Poly Model
20:08 Setting up a Shader (Texture)
23:08 Setting up Blender for Baking
24:11 Baking the Diffuse Texture
25:58 Baking the Normal Map Texture
27:26 Deleting the Hi-Res Model
27:57 Viewing the Baked Model
30:15 Cleanup: Repairing 'Gap' or Holes in Texture
33:46 Adding a Window
34:55 Finishing touches: Bump & Smoothness
39:21 Conclusion
If you have enjoy this video "Hi-Poly Photogrammetry to Low-Poly | Blender Beginner Tutorial", then don't forget to like it, subscribe, share, and hit the notification bell for more like this.

[@iainhmunro]

This was excellent - learned something else, just fab. While this was just a rectangle, what about more complicated shapes like a rock or a house with many more facets to it?

[@deathseverance]

Great tutorial .

[@LifeCodeGame]

This Blender tutorial looks like a great way to learn how to reduce a high-resolution photogrammetry building model into a low-poly, game-ready model while still retaining the fine details of the original hi-res model. Definitely worth checking out!

[@blenderbones]

Hey many thanks. Please do share. My next video will be on the subject of optimising and repairing photogrammetry models. Stay tuned!

[@blenderbones]

I've just noticed that we have the exact same number of subscribers on our channels. I am not going to call it a race :) - I hope it explodes for you.

[@mikhailsk2015]

Excellent explanations and demonstrations, well done 👍
Also very enjoyable and satisfying to watch
Thank you very much

[@blenderbones]

Glad you enjoyed it! Thanks for the great feedback.

[@timgb8746]

Excellent tutorial.

[@GmrGibbo]

Grande! Grazie finalmente ho capito come muovermi tra High e Low Poly! ottimo 💪

[@blenderbones]

Prego :)

[@googleyoutubechannel8554]

So redraw the entire building, got it, wow photogrammetry and modern tools sure are great, no more building things vertex by vertex like we've had to do since the 1970s... oh wait.

[@blenderbones]

Photogrammetry is great. And at least we a good reference for a quick build.

[@joshuadesigfinity]

great tutorial men!!! you have a new subscriber
Can you give me an advice? I want to extract the topography from a 3d scan but without the buildings and trees, but it has really been difficult for me to maintain the irregularities of the Land. im using the tool sculp but i can not have a good results
Thanks!!!

[@blenderbones]

Hi Joshua, No problem at all. I suggest you check out my tutorial on repairing photo-scans. I do cover this a little. Let me know how you get on: th-cam.com/video/_pzTK-LBm3o/w-d-xo.html

[@TheMetalFreshTiger]

!!! Attention: to me the baking doesn’t works in any way. I have your exact same same settings, but the bake of the normals it is or completely flat, pf with just a very very few details, or it ha nothing. Leaving it with Extrusion at 0.1m and Max Ray Distance at 0. I am doing this for a job I’m having, and i really don’t know how to solve this 😢😭

[@blenderbones]

Interesting! Sorry for the long delay in getting back to you. I didn't spot this comment. Did you manage to solve this one?