Questions tagged [normals]

Normals describe how faces and vertices are oriented and can be used to aid various calculations and effects. This tag should be used for questions regarding normals in Blender, from uses to issues.

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22
votes
5answers
118k views

How to make all faces flip to the right/consistent direction?

What's happening is that I have tried to flip the normals, inside and out, but there are always faces which have to be flipped! Normals recalculated Inside View If I flip them again, all faces get ...
5
votes
1answer
880 views

Moving vertices along normal axis in BGE

I'm using BGE and I need to move the vertices of a mesh using Python. I know how to change the position of the vertices in real time but the problem is that they move using LOCAL coordinates and I ...
1
vote
1answer
346 views

Compositor: obtain facing from normals pass to affect glare?

Is there a way to obtain the "facing" of individual pixels on a rendered image by using the normals pass? IE: if a surface's angle points away from the camera, it becomes darker, and when a surface's ...
1
vote
2answers
2k views

Can a single vertex be rotated?

In the duplication options for the dupli verts there is a option for Rotation. Witch brings me to my question, is there anyway to rotate a vertex? Vertex's have ...
4
votes
3answers
12k views

How to flip direction of dupli objects?

I want to know how to get the dupli object to flip? Examlpe: I have bolts distributed on one side of the default cube. How can I get the "bolts" to point out on the other side of the cube. I have a ...
4
votes
1answer
1k views

How to correctly drive a normal node with lamp rotation?

I'm trying to use drivers to allow a lamp rotation to dictate the direction of my normal node. The problem seems to be that the sun can rotate from 0-360 degrees, but the driver has a limit of 0-90 ...
4
votes
1answer
2k views

Dual normal faces

I have created a model which requires some faces to be dual sided. I intend to import this model into Unity. Reading about this, it seems that the recommendation is to duplicate the polygons and then ...
3
votes
2answers
115 views

Is there a way to use the normal of a face to model something else?

I was wondering if there's a way to extract the normal of a specifici face to use it later in something else In my case what i'm trying to do is a pipe that, in its start point, goes perpendicular to ...
13
votes
3answers
29k views

How to flatten a face to avoid distortion (make an ngon planar)

I created a kind of procedural modeled ground (rocks desert like), with some decimate modifiers to have a really crazy topology. The result is nice, except for some ngons faces that contains some ...
3
votes
2answers
1k views

why does fur after combing act unpredictably?

I have created a model of a mandrill and I’ve been using particles to make the fur. Because the fur throughout the body of a mandrill is very different, I’m duplicating parts of the whole mesh and ...
2
votes
0answers
283 views

How do I recalculate normals for all objects in the scene? [duplicate]

How do I recalculate normals for all objects in the scene? Normally, I select an object at a time, press Tab, press a to select all vertices/faces and press Ctrl-n. If I have 20+ objects in the scene, ...
2
votes
2answers
3k views

Color faces based on world space normal

I would like to be able to render a model/scene using the standard renderer (not game mode) where the color of each face/polygon is determined by its world-space normal. For example, looking at a cube ...
3
votes
1answer
2k views

Bump map painting does not work

Painting the Bump map does not work in Texture Painting mode. I can see the normals I painted just after rendering, but not in 3D view. For my bump map texture I enabled Geometry Normal and disabled ...
5
votes
2answers
3k views

Display values of a normal of a selected face

We want to see the three values of a normal of a face when we select it in edit mode. How to do so? Is there any add-on showing these sort of info realtime? Update: It seems the accepted answer ...
4
votes
1answer
1k views

Render has strange artifacts

I've got a problem with my rendering! I'm trying to render some objects: But, this is how it renders: Can somebody help me out?
1
vote
4answers
3k views

Normals messed up after applying transform

I have a simple cube that I'm using to make a wall. I had already duplicated the cube to make more walls and cut some doors and windows into them before I realized that the normals are getting messed ...
8
votes
4answers
3k views

Is it possible to effect the spawning direction of a particle with a normal map?

I've been unsuccessful so far in finding information on, or working out how to control the angle that a particle is emitted from using a normal map. What I'm trying to do is create a texture or UV ...
8
votes
3answers
2k views

Why can I see through a box in blender game engine? [duplicate]

I have a problem where I can see through a box in blender game, see picture. This effect changes so that the near side of the "chassis" of the truck is invisible when I rotate the model What can I do ...
10
votes
2answers
10k views

How can faces be rotated around their individual normals?

In edit mode with these settings: Face selection Pivot point: individual origins Transformation orientation: Normal The faces don't rotate around the normals, is there another required setting that ...
5
votes
1answer
1k views

Bump node in Cycles, with an OSL script — am I doing it wrong?

I'm relatively new to Cycles, so maybe I don't understand all its finer points yet. I am trying to create a normal map from a grayscale bump map produced by an OSL script. The script seems to output ...
4
votes
1answer
1k views

How to make all polygons face outwards in an existing model?

I need to export some .blend files into COLLADA. Unfortunately, all polygons are designed double sided. In order to properly use culling within my 3D application, I need all polygons to face outwards. ...
37
votes
3answers
61k views

Why are some faces in my mesh darker?

While rendering a mesh with smooth shading on, I get a dark region/shadow on certain faces. The effect is more evident when smooth shading is applied to a mesh containing ngons, with the ngons turning ...
6
votes
1answer
711 views

Why do normal map ridges become grooves in mirrored object?

My model has a pair of objects, one a mirror image of the other, like bookends or a pair of wheels. They use the same cycles nodes material involving a normal map. Ridges on the one object appear as ...
15
votes
1answer
11k views

Liquid / glass interface IOR and normals in Cycles

When modelling / rendering a glass with liquid inside (in Cycles), which direction do the normals for the glass only surfaces, shared glass-liquid surfaces, and liquid only surfaces point? I have ...
7
votes
2answers
1k views

How to keep the vertex normals after deleting an edge/face?

When replacing sparse quads with a custom mesh, I create a "base vertex" on each quad, in order to cause a Particle Instance modifier to spawn the custom mesh at the right place (like for spawning ...
5
votes
1answer
321 views

Which normal input socket should I use when I have a mix between shaders?

Since we have the option to use normal maps in Cycles via the normal input socket, this question frequently pops in my head: In the simplest mix, diffuse and glossy, should I connect the normal map ...
4
votes
1answer
2k views

How does Blender calculate path normals?

In Blender, paths may be used to animate objects or to sweep surfaces. Both of these actions require that every point on the path has a normal. If this requirement were not fulfilled, the orientation ...
8
votes
1answer
6k views

Messed up Blender models when exporting to Unity3D

I have modeled a simple pocket watch in Blender. Every time I import it into Unity3D, regardless of whether I export it from Blender as an FBX or 3ds file, it always comes out missing faces! Why is ...