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12 votes
Accepted

How do games programmatically manipulate 3d models?

There are multiple ways to do this: The first and the most popular way is to create a skeleton for the model, then use this skeleton to move around the vertices of it. This is also usually done by ...
Bálint's user avatar
  • 14.9k
7 votes

How to make a map (game world) based on a real world place or city?

Here is the map of Chicago from Watch_Dogs: And here is the map of Chicago from Google Maps: As you see, these maps don't have much in common. When seen from a birds-eye perspective there isn't even ...
Philipp's user avatar
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7 votes
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How to create Half hemisphere 3D model

If you just need it once, I'd suggest you pick up some basic knowledge of a modelling tool. It's very easy to do in Blender: Delete the cube that you start with by pressing ...
1000ml's user avatar
  • 293
7 votes

How do games programmatically manipulate 3d models?

Animatable 3D models come with a skeleton (either the modeller or animator does this step of modelling, since it's in a bit of no man's land). The skeleton is made of bones, relatively positioned ...
Brian H.'s user avatar
  • 310
4 votes

How can someone make 3D tiles not looking like perfect cubes?

Usually to render a large quantity of gird aligned cubes is to use a method known as "Marching cubes". Note: the main alternative is to use ray casting and voxels (point cloud data), which is less ...
Theraot's user avatar
  • 27.2k
4 votes

What is "mapping seams" and "hard edges (doubled-up vertices)" in UV?

Inside the GPU pipeline, each vertex represents a unique combination of: a position (so we know where to draw this corner of the adjacent polygon(s) on the screen) a normal vector (which way the ...
DMGregory's user avatar
  • 135k
3 votes

How Many Entities can the Unity Game Engine Handle Before it Starts to Lag?

You can't generalize that because the resources consumed by an entity (CPU, system-memory, bus bandwidth, GPU and GPU-memory) vary greatly depending on their components. Do they have colliders? Do ...
Philipp's user avatar
  • 120k
3 votes
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How do I shade / model low poly smooth surfaces that come to sharp edges?

You need to set the mesh to smooth, then "cut" the edges that have to be sharp by duplicating them. You need to select the edges you want to make sharper, then hit Ctrl + E and choose the "edge split"...
Bálint's user avatar
  • 14.9k
3 votes
Accepted

How to clip 3D object in projection (octants)?

First of all, you need to check if the line intersects the octant. You have 3 cases: The line is completely contained within the octant (the x, y, and z coordinates of the endpoints are positive). ...
Bálint's user avatar
  • 14.9k
3 votes

Does decreasing rendering resolution also decrease the amount of polygons in my 3d models?

No your meshes do not lose polygons. Only the amount of fragments generated by the polygons will be reduced. If you think about it, where would the polygons go? You still need all of them to make sure ...
Lasse's user avatar
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3 votes
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Are there common types of human skeletons in gamedev industry?

Yes, indeed. Unity (for instance) will accept a fairly broad variety of rigs to be converted to Humanoid Avatars as long as they follow the same basic structure. Adobe's Mixamo is one source of ...
Acme Nerd Games's user avatar
3 votes
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How are the unwrapped textures created?

There are some dedicated software tools that allow you to paint a texture directly on a model. An example of this would be Substance Painter as you mentioned in the comments. Personally, I don't have ...
Pikalek's user avatar
  • 12.4k
3 votes

What is the use of multiple vertex color sets

Vertex colours are just arbitrary extra data you can pack into a mesh - you don't have to use them as literal colours when rendering. So frequently, these get used as control weights for a variety of ...
DMGregory's user avatar
  • 135k
2 votes

How to make a map (game world) based on a real world place or city?

Philipp's answer is slightly misleading, because it places the wrong maps against each other. In the maps below, look at the river, the Navy Pier, and the park. The rest of the answer I agree with: ...
Peter's user avatar
  • 9,935
2 votes

Handmade Terrain vs. Terrain Engine in Unity?

Polybrush - Polybrush is a free tool, that allows unique terrain sculpting. It may have a feature to blend between terrains. Or you can use this as a main terrain solution. There are many ways to ...
Candid Moon _Max_'s user avatar
2 votes

How to join two cubes?

If you generate box collider's on empty objects with shape of these boxes, and your scripts are on a parent of 2 objects that have these colliders, any of these colliders will trigger OnCollisionEnter(...
Candid Moon _Max_'s user avatar
2 votes

How to join two cubes?

Ultimately, you can take whichever option suits you best, personally. You would easily get away with either. Leaving the Cubes Separate If you do not join the cubes, they should import into your ...
Gnemlock's user avatar
  • 5,273
2 votes
Accepted

What takes up more processing power between whole character models or models that are pieced together in Unity?

Combining several objects or animations into one will require slightly less computations (avoiding duplicated initializations, updates, etc), and will therefore have a slightly better performance. ...
wip's user avatar
  • 318
2 votes

What is the difference between Character Modeling and Level Design?

A character modeller is a 3D artist responsible for creating the polygon meshes for characters in the game. Depending on the team they might also do some or all of the texturing of those models, or ...
DMGregory's user avatar
  • 135k
2 votes

For creating a distant moon in a 3D game, is it better to use a model or texture?

At moon distance/scale, you're unlikely to be able to see any benefit from a 3D model. Especially if the moon is tidally locked like ours is (only one side visible from the ground) A textured polygon ...
DMGregory's user avatar
  • 135k
2 votes

Implementing mirrored coloured glass VFX like in Ant Man

This is a Kaleidoscope-like effect. Assuming you're implementing this in Unity or Unreal Engine, you would either use a particle effect or a postprocess effect. A particle effect would be used if ...
CourageousPotato's user avatar
2 votes
Accepted

How to count polygons in Unity?

"tris" is short for "triangle" which in the context of 3d rendering is usually synonymous with "polygon". According to mathematicians, polygons are two-dimensional shapes ...
Philipp's user avatar
  • 120k
2 votes

Is it possible to create map files for a 3D game using AutoCAD and 3ds Max?

"Is it possible" is a question you can answer for yourself. Searching "Unity model file formats" takes you to this page and this one which confirm that you can use models in the ...
DMGregory's user avatar
  • 135k
2 votes
Accepted

Is it better to cut floor polygons where they're hidden under objects?

There are costs both ways. If you leave an occluded polygon present, you may pay some fill rate / overdraw cost for it (time spent drawing floor pixels that will later be drawn-over by pixels of ...
DMGregory's user avatar
  • 135k
2 votes

Building a 3D modeling and importing workflow of a 3D indie game model

Part of the philosophy of Godot is to build a free software ecosystem, and yes, that includes compatibility with Blender, and also with open standards. Making games or video I'll assume that you are ...
Theraot's user avatar
  • 27.2k
1 vote

What should I watch out for in a 3d artist's portfolio?

You should look for imagination, creativity, ability to work with a team, from where he gets inspiration, ability to schetch out a quick example of an idea... there are a lot of things to take in ...
Gjx's user avatar
  • 21
1 vote

Where is better to do shaders, vfx, uv-mapping and coloring?

Modelling, uv unwrapping, texturing, and skinning should all be done in your content generation tools (eg. 3DS Max, Blender, Photoshop, etc...) Your final shader & material setup should generally ...
DMGregory's user avatar
  • 135k
1 vote

3D scanners that captures movement?

I don't know of anyone having done this but it may be possible. There are a number of 3D scanning systems available that use consumer sensors like Kinect; as you can see in this video of one such ...
jhocking's user avatar
  • 15.8k

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