From: #WONG CHEE HOW# (P7443050C_at_ntu.edu.sg)
Date: Mon Nov 11 2002 - 09:52:17 CST

Hi folks,
 
I have another problem with color. Can't get away from 'color' problem. Haha. Anyway here is my latest encounter with color. I managed to write a TCL script that changes the default RGB scale to greyscale, ie, from white to black. However, due to the shadow effect in VMD, white is not truly white. And if I dont do anything about it, and export the resulting bmp file to MS Word, the contrast between white and grey is not big.
 
Hence, I played around with the lights, and if I 'turn on' all the 4 lights, white becomes white, but unfortunately black has became grey. Then I fiddled with 'depth culing' and 'culling' but in vain. I wonder did I miss out anything that I should have tried. Or have I missed out anything from the manual. Therefore, I would like to find out if there is any method that I can 'turn off' the shadow effect, so that I have a white that is truly white and a black that is truly black?
 
By the way, I am only using a gray scale of only 5 shades with white being the lightest and black being the darkest. I, therefore, believe that the other 3 gray shades in between should have a contrast big enough to be noticed without having the need to strain the eyes.
 
The other method that I tried is instead of using a color scale from white to black, I decided to go for light blue to dark blue, and then light red to dark red and so forth. Unfortunately, no matter what combination I tried, the contrast is still not big due to the 'shadow effect'. And after exporting the bmp file to MS Word and then changing it to greyscale in MS WORD, the contrast further deterioate.
 
If I use a color scale from blue to green then to red. Though it looks nice in color, but when I print it out in greyscale, I am no longer able to differentiate the color scale as, for instance, both blue and red may be converted to black making it difficult to determine the difference.
 
Can someone please help me to solve these problems?
 
Thanks a lot.
 
Regards,
Chee How