Questions tagged [camera]

The camera is an object which defines a point of view in 3D space for the context of rendering. The camera also has settings for depth of field (DoF) and other effects/settings real cameras have.

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31
votes
2answers
29k views

How can I get better results when doing camera motion tracking?

Whenever I do camera tracking in Blender the reconstruction is always zooming out or not on the axis. I have a great quality camera, but the end results of the camera tracking always has the model ...
34
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1answer
122k views

How do I increase the render distance?

I have created a simple model here When rendering it the end of it is cut off How can I get the camera to render a longer distance?
126
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4answers
211k views

How can I make a camera the active one?

I have multiple cameras in a scene. What I want to do is to change which one is active. This way I can view the scene from different angles. How would I do this?
39
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3answers
52k views

How to make a cycles light emisson object invisible to the camera?

In my scene it is required to position the lights close to the main object like this: How I can make the light source invisible to the camera?
175
votes
10answers
321k views

What's the quickest, easiest way to point the camera somewhere in blender?

Often I want to just point the camera to an object or a specific area in my scene to get an idea of how it'll look in the render. What's the most painless hassle-free way to do this in blender? A ...
15
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1answer
19k views

Rendered aspect ratio different from the viewport's camera view

Why would there be a difference in aspect ratio between a rendered image, and the camera perspective in the viewport? My render is getting squashed to fit a different aspect ratio. Here is a scene ...
6
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1answer
14k views

Some Data Failed to Reconstruct, Motion Tracking

I added tracks and stuff, but then when I tried to solve motion track, there was a error that said: Some Data Failed to Reconstruct and it also said to look into the console for details, which I ...
21
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2answers
22k views

I accidentally set an object as camera, how do I undo this?

I have a problem with rendering in cycles. In blender render my object is rendering fine, but in cycles when I pushed F12 I got only this: One more thing: when I click 0 on keyboard I'm not in camera ...
20
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2answers
27k views

Movie Clip On Plane

In blender cycles render engine, how do I put a movie clip on a plane so it displays the video? I want the video to be on the plane if there is a way.
4
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1answer
3k views

Background image shows in front of 3D objects, not behind them.

I've done a quick 3D track in blender and I'm trying to render my output, but the plate I used to track is showing up over my 3d objects. I want to render the objects in the scene with an alpha ...
68
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4answers
90k views

Render just part of a final image from Cycles?

I'm using an older Nvidia chip that hates running viewport renders, and I need to check if changes to the materials on a few objects not far from the center of my scene are (I'm rendering a floorplan ...
4
votes
2answers
2k views

Add camera at random position through Python

I am using Blender for the first time. Currently, I have a basic scene with a camera and some light sources present. What I would like to do is to add a second camera that is located at a random ...
10
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2answers
2k views

Setting camera to position where it can render a seamless repetable orthographic scene

I'm using 3d to speed up production of 2d graphics of machines and structures (which have a lot of straight lines, objects and little details repeated all over the place). The goal is to have an ...
8
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2answers
4k views

How to find all objects in the Camera's view with Python?

I have a scene with a many objects and one camera. I would like to select the objects that the camera sees, even partially. Is there a way to do that in Python that accounts for the objects bounds? ...
3
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1answer
6k views

How to pick good keyframes for motion tracking?

What are good practices for picking good keyframes when motion tracking? How are these frames used? What is an "ideal" keyframe?
25
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2answers
19k views

3x4 camera matrix from blender camera

In computer vision, the transformation from 3D world coordinates to pixel coordinates is often represented by a 3x4 (3 rows by 4 cols) matrix P as detailed below. Given a camera in Blender, I need ...
14
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2answers
26k views

Viewport pivot point changed from scene objects to around viewport camera origin

I am starting to learn using blender, and at some point I managed to do something to the 3D view camera. Usually the camera orbits around an object, but now the rotation seems to happen (atleast very ...
4
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2answers
5k views

continuous sequence of frames with multiple cameras with each camera starting at start of animation?

I have baked a fluid simulation that runs for 300 frames. I have 3 cameras, one from the left side, one from the right side, and one from the top. Can I render a sequence of 900 frames where the ...
10
votes
1answer
3k views

Camera projection without generating UV's?

I'd like to project an image sequence onto arbitrary geometry without touching its UV's. I already tried the UV project modifier as well as a lamp as projector. Using the Mapping node within the ...
17
votes
2answers
39k views

Objects disappear when looking through camera [duplicate]

When I go to camera perspective, there are parts of my object that I can't see. I tried adding and deleting my camera a lot of times and positioning it so that the objects I would like to see on my ...
9
votes
4answers
11k views

Solve error high with good track?

So I recorded some Footage in front of my school and tracked it. The tracking points themselves seem alright (I think) but I get an average solve error of around Five. Here are my settings: The ...
11
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2answers
15k views

Change start time of camera following a path?

I made a path and have my camera following the path (Shift + A: Curve->Path) based on a youtube tutorial and this question: Camera angle should follow path angle. However the camera starts following ...
15
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3answers
14k views

How can I get the camera's projection matrix?

As asked. I need a way to get the projection matrix of the active camera, via python. EDIT: I think this question is different from the one asked here, because getting a matrix is different from ...
9
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2answers
2k views

How can multiple Curves be used to control Camera movement?

I currently use a Track to Constraint to make the camera automatically point to an empty. In an animation the camera is moved along a bezier curve (follow path). How could I change the curve and ...
4
votes
1answer
3k views

Problem with camera orientation in motion tracking

sorry for my English, I write from Italy. I'll try to explain my problem. I'm tracking a footage with a solver error 0.2973. When I try to set the floor, the orientation of the camera is wrong (see ...
4
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6answers
17k views

How to increase camera frames view area? [duplicate]

The Camera view area is so small (see picture). How can I increase it?
13
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1answer
5k views

Camera Tracking markers

I want to do some camera tracking. The things that I will be filming does not have a lot of detail on it, so that I will have to place some extra markers here and there. I am not sure what kind if ...
9
votes
1answer
7k views

What is blender's camera projection matrix model?

I have question what is blender's camera projection model. I want to use blender to my computer vision experiment which need to compare real photo and CG. For real photo, I used camera matrix K for ...
5
votes
1answer
22k views

How do I set focus range?

I know about depth of field but I have no clue how to set it to my liking. Is there an add-on for those of us who aren't camera savvy about adjusting focus? Like a visual line to show what is in ...
2
votes
1answer
4k views

How to align the camera in a solved motion tracked scene?

I have been having an issue with my floor plane and object when using a solved camera after tracking some footage. I get a solve error of between 0.05 and 0.4 on my solves which is good and not the ...
1
vote
1answer
2k views

Motion Tracking objects that go out of frame and re-enter later

I am motion tracking a video in which the camera turns away from one scene and then shortly returns to it. However, the segments that went off-screen lose their track and do not continue tracking once ...
30
votes
3answers
69k views

Is there a Way to Align Camera to View and Fit the View?

Pressing Ctrl Alt NumPad 0 causes the camera to teleport over and align itself to the current view in the 3D viewport. However, it usually takes up only a small portion of the view, meaning that you ...
8
votes
1answer
5k views

How swap views between multiple cameras?

I have multiple cameras with an animation scene. I want to swap to their respective views while rendering the video. So, essentially, my questions here are: How do we get renders from multiple ...
8
votes
2answers
9k views

Lens specs of smartphones for camera tracking in Blender

I've been trying to track a footage taken by my Samsung Galaxy Note 8.0 (GT-n5100) tablet. It has a good 5 mp camera and I tracked the footage well. But the problem arises at the time of solving the ...
4
votes
2answers
7k views

How can I view the camera through an object as a material in Cycles?

Kind of like a TV, CCTV, or the portal for Portal and Portal 2, so I can see what the camera is seeing on an object. I don't care whether its a material or a modifier, or something like that, even if ...
3
votes
3answers
7k views

Create a plane that always fits the camera viewport

I'll try to keep it clear: I want to use a background in Blender and for that I use a plane that I want always to fit the camera viewport. I wanted to do it cleanly, so I put a plane at the same ...
15
votes
2answers
3k views

How can I get a cabinet projection camera?

How can I get a camera to render with a cabinet projection? I know it is possible to get a gaming isometric projection, but that's not really what I want. I've tried positioning an orthographic ...
3
votes
2answers
150 views

Constrain a camera to an object while also aligning it perfectly to the center of the object (relative to the camera) even while using perspective

So, Im trying to constrain a camera to view an object perfectly in the center... Ive set a constraint on my camera so that it uses "track to" to point at the center of my shape. However, I ...
20
votes
1answer
7k views

How to smooth camera animation to have fluid feel?

When dealing with camera motion, its very sensitive to any movement discontinuities. Is there a way to easily achieve natural looking motion when dealing with complicated motion paths and timings? ...
31
votes
1answer
64k views

Constraint the camera to look at an object

In my scene I have a camera sitting at the origin. I would like to contraint it so that it always looks at the center of a given object. But the camera should not change its position. I found some ...
19
votes
1answer
943 views

Cycles generates distorted depth

The depth map generated by the Cycles rendering engine seems to have (radial) distortion, while the Blender renderer does not. However, I could not find anywhere information on the internal camera ...
13
votes
3answers
11k views

Create and export bounding boxes for objects

I am using Blensor v2.67. I have a camera and several objects in my scene. The camera follows a path and I would like to save what the camera sees for each frame. Among other things, I would like to ...
6
votes
3answers
3k views

Problem with casting rays from the camera into the scene for each pixel

To retrieve information about the objects that lie behind each pixel, I have to cast rays into the scene for each pixel of a rendered frame. My problem is that the ray directions which I calculate ...
18
votes
3answers
21k views

How can I make a plane always look at camera? [duplicate]

How can I make a plane always look at camera? Like in old videogames, like Doom or Wolfenstein, this kind of software used static images that always looked at the camera, is this possible to make on ...
15
votes
1answer
4k views

Make an object invisible to a specific camera? (Cycles)

I'm trying to set up multiple cameras for a scene set in a room. Is there a way to link object visibility to a specific camera? Ideally, a wall or ceiling would not render if it were in the way of the ...
8
votes
5answers
33k views

Camera - follow path and change rotation

I created the camera moving by the curve using parenting and follow path option. However, how to do so that the camera moves on this curve, simultaneously changing the rotation so that all the time it ...
7
votes
1answer
4k views

Camera angle should follow path angle

(I'm a blender beginner but know a handful of techniques with other similar programs/systems) I've created a NURBS to make a tracking shot. Creating a follow path object constraint on the camera lets ...
9
votes
2answers
2k views

Making a realistic infinite mirror tunnel

You know when you're standing between two walls that both have mirrors on them and it makes it look like each mirror is an infinite tunnel going into oblivion? Something like this: (photo from ...
2
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2answers
1k views

Camera tracking: Moving the camera too much

I am working on a scene which is a corridor, and I want it to seem like someone is "holding" the blender camera while running down the corridor. I asked how I would accomplish this and someone said to ...
8
votes
2answers
5k views

how to take images with multiple cameras with Script?

To be clear i want a script, which produces what i am describing below. I want to iterate through all the cameras in my scene where each one renderes an image. I can do this manually by rendering with ...

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