I'm simulating a 3*3*3m room, and have one window on one wall, does anybody
have similar experiences about how to get a good picture face to window
inward? I find some beautiful perspective pictures in some papers.
Best is if you imagine taking a picture with a camera in such an environment. I do not know if you have any experience as a photographer, but you would most probably use a wide angle lense, as the room is small and you want to see a perspective vıew, not just one wall. Try something like -vh 90, which would open the horizontal field of view to 90 degree. Also, sketch a plan of your room, and mark view-point and field of view (which would be an angle at the viewpoint), so you can get an idea how much you can see of your room at a given point with a given lense.
This is much more about photography/sketching then Radiance.
You could use rvu and just play around, but it is still better to KNOW what you are doing 
Good luck, Lars.
I mean to get a picture from ''rvu".
There are commands in rvu to rotate the camera around camera center (r),
around a center on an object surface (p), to move the camera (m) etc.
You should set a wider field of view as a command line parameter. When
you are happy, you save the view to a view file.
To be honest, I never felt that comfortable navigating in rvu. So I
choose a number of promising views (using my paper-and-pen-approach) and
do some previews, feeding the view parameters to rvu on the command
line. Usually I imagine where I want to stand, what should be in the
center of the image, etc, so I use rvu as a pure preview.
Of course you can also use any 3d-modeler to find camera position,
direction etc. IT should only be possible to define field of view (or
"focal length").
CU Lars.
As Lars wrote, first get an idea of the geometry you want
to see and find the coordinates for the view point and a
view directions. Once you have started rvu press 'v' and
fill in the view parameters (view point, direction, up,
angle, clipping). Repeat with small changes until you have
a nice view.
You can save the final view parameters but also the image
('W') to a file. The clipping is useful to create parallel
and perspective views that are physically impossible (eg.
a perspective of the interior of the room from the outside).
Read the man page for rvu. It tells you all the tricks.
Thomas
···
On 15 Jul 2008, at 08:51, Lars O. Grobe wrote:
I mean to get a picture from ''rvu".
There are commands in rvu to rotate the camera around camera center (r),
around a center on an object surface (p), to move the camera (m) etc.
You should set a wider field of view as a command line parameter. When
you are happy, you save the view to a view file.
