Do You Know the 4 Ways of 3D Modeling?
3D modeling technology has become a common digital representation that people use in creating architectural visualization designs these days. Archicgi, a well-known architectural visualization company, divides CG modeling into the following four types according to the different processing and modeling processes and production methods of 3D objects:
When creating complex 3D objects, it is suitable for direct modeling when it is necessary to manipulate separate simple shapes. Because in this case, if modifications or additions are required, the overall geometry of the model will not be affected.
At the same time, this modeling method is also useful when you need to render realistic images with CG objects. It allows you to change 3D objects more flexibly without being tied to any specific parameters.
The most widely used software for making 3D models in this way are: 3ds Max, Blender and Maya. There are two main subtypes of direct modeling: polygonal and spline modeling.
Polygon modeling can be divided into two types: high polygon modeling and low polygon modeling. High poly and low poly can be used to make 3D assets for AR and VR, high poly modeling is often used to create still photo-realistic images, rendering time is longer than necessary.
Because the edges of polygons are always straight lines, the disadvantage of 3D modeling is that objects with perfectly smooth curves cannot be created. If you need to obtain a smooth surface appearance, you need to use a large number of polygons and cooperate with the smoothing tool of the software.
Spline modeling is the use of splines (2D elements such as lines and circles) to create 3D objects with complex shapes. Typically, with tools such as Bezier curves, spline modeling can be used to quickly build 3D models with a large number of curves.
The most prominent disadvantage of spline models is that they cannot be UV unwrapped, so you cannot create UV maps to add texture to such objects, only by converting the polygon mesh.
In parametric modeling, models can be created and edited by introducing parameters. When new parameters are added, all objects will be created and changed automatically, and the characteristics and relationships of each element in the model will be determined. It is usually more effective when combined with direct modeling. good.
While parametric modeling is very precise in optimizing construction designs, it is tedious to create with extremely precise measurements, so this type of modeling is rarely used in the early stages of work.
Some popular parametric modeling programs are mainly Rhino with Grasshopper, Autodesk Fusion 360, FreeCAD and CATIA.
Using BIM it is possible to create an intelligent model including structured data about each element. During the modeling process, you can accurately calculate the quantity of each material, the time required to complete each construction stage, and the cost of the project.
In addition, BIM technology can also analyze design iterations and use generative design to find the best solution based on specific goals, making your building design more sustainable, while being able to test the performance of reflective surfaces or wind and shadow simulation.
Examples of such 3D modeling software include Autodesk Revit, SketchUp, and ArchiCAD.
Point cloud modeling is mainly to create a 3D representation point cloud of an existing structure through 3D scanning, and then use a program such as Autodesk ReCap Pro to import the point cloud into a digital environment for editing and other operations, convert it into a 3D mesh, or use it to build BIM models.
Direct modeling
At the same time, this modeling method is also useful when you need to render realistic images with CG objects. It allows you to change 3D objects more flexibly without being tied to any specific parameters.
The most widely used software for making 3D models in this way are: 3ds Max, Blender and Maya. There are two main subtypes of direct modeling: polygonal and spline modeling.
polygon modeling
This way of creating 3D models is the most versatile. You build an object by setting up a mesh of polygons: tiny constructs with three or more straight sides, the number of polygons determines the level of detail of the model.
Polygon modeling can be divided into two types: high polygon modeling and low polygon modeling. High poly and low poly can be used to make 3D assets for AR and VR, high poly modeling is often used to create still photo-realistic images, rendering time is longer than necessary.
Because the edges of polygons are always straight lines, the disadvantage of 3D modeling is that objects with perfectly smooth curves cannot be created. If you need to obtain a smooth surface appearance, you need to use a large number of polygons and cooperate with the smoothing tool of the software.
spline modeling
The most prominent disadvantage of spline models is that they cannot be UV unwrapped, so you cannot create UV maps to add texture to such objects, only by converting the polygon mesh.
Parametric modeling
While parametric modeling is very precise in optimizing construction designs, it is tedious to create with extremely precise measurements, so this type of modeling is rarely used in the early stages of work.
Some popular parametric modeling programs are mainly Rhino with Grasshopper, Autodesk Fusion 360, FreeCAD and CATIA.
BIM modeling
In addition, BIM technology can also analyze design iterations and use generative design to find the best solution based on specific goals, making your building design more sustainable, while being able to test the performance of reflective surfaces or wind and shadow simulation.
Examples of such 3D modeling software include Autodesk Revit, SketchUp, and ArchiCAD.
Point cloud modeling
Point cloud modeling is mainly to create a 3D representation point cloud of an existing structure through 3D scanning, and then use a program such as Autodesk ReCap Pro to import the point cloud into a digital environment for editing and other operations, convert it into a 3D mesh, or use it to build BIM models.
评论
发表评论