On a black background, a white (#ffffff) rectangle with 50% transparency (Mix) is darker than a 50% white (#808080) rectangle. Shouldn't it look exactly the same?
Software: Xtreme Pro 5.1
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On a black background, a white (#ffffff) rectangle with 50% transparency (Mix) is darker than a 50% white (#808080) rectangle. Shouldn't it look exactly the same?
Software: Xtreme Pro 5.1
Oh probably. But it is more of an eyeball thing where you know it's the right amount when you see it. :)
Anyway that is very good question like that precisely :-) Finally the vector graphics based on math so really why it does not exactly the same? :)
Using X9 here.Quote:
Originally Posted by feklee
Which white rectangle, using your hex numbers and transparency number, is which?
To me the one on the right looks darker, Mike. But I sampled both and I was wrong.
I can confirm Mike's results in DPX9.
This is using version 6. I don't have a version before 6 to try.
I didn't save my original test case, and lost it (computer crashed). Now I cannot reproduce the issue anymore. It could be that I did something wrong or that there is a strange bug in 5.1 which only manifests itself under certain circumstances.
Time to Upgrade. ;)
I did a test of various options and did find a 1 point difference in a few of the resultant colors but these may have been rounding off issues.
maybe depends how you do itQuote:
Originally Posted by feklee
for example, if I type in 808080 in the colour editor to set the second square, I can see a very slight variation, and this may be because when I look at the HSV value it is H-0 S-0% V-50.29%
if I then reset the HSV to H-0 S-0% V-50% exactly the slight difference disappears [the hex value displayed remains at 808080]
I set gray scale intensity to 50%, and the result was #808080 for RGB. But the difference to the 100% white 50% transparent object was big, i.e. not just a rounding error.
ok I am not seeing any difference once the values are correct.... but I am not using 5.1, so it may be a bug as you say... (I'm using XDPX [ver 8])