LuxRender Cameras
Views
Personal tools
From LuxRender Wiki
LuxRender supports four different camera types. The differences between the camera types and the available settings are explained below.
Contents |
Perspective Camera
The perspective camera is a camera type that is similar to cameras in most 3d packages: it does create a perspective image out of a three dimensional scene, but it does not aim to represent the imperfections and distortions that lenses of photo cameras typically create.
Field of View
The value for field of view indicates the angle between the camera and the leftmost and rightmost visible points in the scene (or the top- and bottommost points, if the image is vertical). The exporter normally gets this information from the selected camera in the scene, but the value can be overridden.
Depth of Field: lens radius, f-stop and focus distance
Depth of field indicates how sharp (infinite depth of field) or blurred (shallow depth of field) objects that are not in focus appear. For the perspective camera in LuxBlend, this is defined by the lens radius or f-stop value.
The default lens radius value (0) results in an image where everything is in focus. Larger values result in a more shallow depth of field.
The alternative method (and only one available in LuxBlend25) is to define an f-stop value in the camera tab (This is the method used on real cameras). With f-stop, smaller numbers create a more shallow depth of field.
Focus distance is the distance between the point in the scene that will be in focus and the camera plane. You can either use an object or a distance to set the focal point. An easy way to use this feature in Blender is to create an Empty object, place it where you want the camera to focus and select it in Depth of Field box.
Note that for the different examples, the focal point is the green sphere in the front. As the lens radius increases, the background becomes more blurry. Lens radius setting is not currently available in LuxBlend25
Note that for the different examples, the focal point is the green sphere in the front. As the F-stop is increased the background objects become more in focus
Shutter
The shutteropen and shutterclose entries in the .lxs file are typically used for Motion Blur.
Lens Shift
A shift lens is a lens that can move the position of the horizon up or down without introducing perspective distortion in the vertical direction. Amongst others, this can be useful for architectural perspectives where most of the subject is above the horizon.
The unit of measurement for lens shift is the size (either horizontal or vertical, depending which of the two is biggest) of the image. For example, using a horizontal value of 0.5 will result in an image whose left edge is straight in front of the camera.
Clipping
Camera clipping hides part of the scene, based on the distance to the camera plane. There are two settings, Start and End. When Start is set to 0 and End to a value bigger than the size of the model, everything will be visible. The geometry that is hidden by the camera clipping is still taken into account for the lighting calculations.
Orthographic Camera
The orthographic camera creates an orthographic projection of the scene. This can be used to create straight projections (like a top view or a frontal view) and axonometric projections.
Scale
The scale value sets the scale of the view. The scale number indicates how many model units fit in image. For example, at a scale of one, one model unit will fit exactly in the width of the image (or the height, in case the height is bigger than the width) and at a scale of one hundred, one hundred model units will fit in the image.
Clipping / Depth of Field / Focus Distance / Shutter / Lens Shift
These settings work the same way as the perspective camera settings.
Environment Camera
The environment camera creates a 360 degree image from the current camera position. If the camera is completely horizontal, this results in a panoramic image. Amongst others, this can be used to create high dynamic range environment images for image based lighting.
Clipping / Focus Distance / Shutter
These settings work the same way as the perspective camera settings.