CGTalk - R10: strange color behavior of material.

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Newstream

11-26-2006, 06:13 AM

Hi,
I'm experiencing some odd behavior with a material color in R10.
Background: Instead of selecting a color directly in the color channel, it can sometimes be more convenient to place a color under a filter, thereby being able to tweak saturation, brightness etc later on through the simple and convenient controls of the filter manager.
I'm finding at least one color that gets completely inversed.

Step by step:
Create a new material > In the texture field of the color channel, create a filter > In the texture field of the filter channel, create a color (the one on top fresnel) > Click on the color button to access its settings > Create a cyan color with the following values R74, G 186, B186. Navigate out / up and check the thumbnail. On my machine, I get a pink-purple color instead of the expected cyan.

Have attached the file. Have a look at the "BUG?" material.
Anyone experiencing the same thing?

Cheers / Alex

willsud

11-26-2006, 10:19 AM

Yes, I get the same result - no idea why, yet

http://www.lakedistrict-architect.co.uk/Cinema4D/colourchange.jpg

Newstream

11-26-2006, 11:27 AM

Thanks for confirming this William.

If this is the only color (out of millions) that gets reversed when combined with a filter then maybe I should go out and buy a lottery ticket or something because to my knowledge, this doesn't happen with any other color.

hmm... how odd.

Cheers / Alex

EDIT:
PS. Is this an R10 thing only or does the same anomaly occur under R9?

willsud

11-26-2006, 11:34 AM

It happens with other colours too.

I cannot predict which colours yet, but moving the sliders around there are definite 'flip points' where there is a dramatic change of colour.

...just tried it in 9.6 and the 74,186,186 colour does not 'flip'

otomo

11-26-2006, 12:29 PM

this looks definitely like a bug. :-( We had materials in our last project, in which we have adjusted the color of texturemaps via the Filterchannel. What looked like a landscape in natural colors before looks now like some Expressionist painting.

vid2k2

11-26-2006, 12:55 PM

In v10 demo, if you click the value "187" up by 1,
the color flips to cyan again,

In 9.6, there is no problem.

Rantin Al

11-26-2006, 04:43 PM

Bug already noted here. (http://forums.cgsociety.org/showthread.php?t=422843)

The Green channel is the culprit.

Cheers, Alan.

willsud

11-26-2006, 04:50 PM

thanks Alan - saved a bit of head scratching :)

Rantin Al

11-26-2006, 05:42 PM

I don't like to see people suffering.:)

LucentDreams

11-27-2006, 04:51 AM

yes the bugs been found and confirmd already.

ust fornot, if you want to change the HSL of a color instead of RGB there are othe color modes for cinema in the preferences. the dnhanced color picker offers both RGB and HSL in one single picker.

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