🚀 go-pugleaf

sjm@miles.com (Scott Mark) writes:

>From the original posting:   (No offense intended, but read what I _wrote_!)

>>I have been thinking about doing animations with POV, but it seems that
>>the texture I'm using (DMFWood4) shifts when I move my camera!
>                                                        ------

>I am not moving objects, before or after applying textures.  For completeness
>I am including the scene file below.  It is short.  It doesn't take long
>to render with antialiasing turned off.

>When I render the following scene, I get some nice variation to the rings
>running diagonally from top-front-left of the box to bottom-front-right.

>If I move the camera to <1 7 -10> to get a closer look, the variation
>disappears!  Just nice smooth concentric rings.

[ data file deleted ]

Not trying to make you feel like a bonehead or anything :) but .... there
is nothing wrong with your texture. You have the same texture in both
viewpoints. The reason they look different is due to the Moire effect. The
pixel resolution of your monitor is unable to accurately respresent the
pixel rez of the data file.

I traced both views with the following options:
  +w320 +h200 -v +d +ft +b300 +a0.1 +q9
and converted both images to rle format. They are available for ftp from
matt.ksu.ksu.edu (in incoming) for a short time. You will need to have
getx11 installed to view them. I recommend using the zoom feature (mouse
buttons) of getx11.

With the zoom functions it is plainly obvious that both of the wood grains
consist of nearly straight lines.

-- 
                                                    John "Dudley" Hunkins
                                                  dudley@matt.ksu.ksu.edu