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ianay
02-12-2019, 03:49 AM
Im pretty sure this is a simple issue to resolve but its doing my head in!
When I have bump map with an image color surface, I desaturate the image then... Heres where the problem starts
I copy the the color layer then paste it onto my bump surface, then replace the image in the bump map with the desaturated image.. (its either that or copy down all the scale, position,rotation etc values)
But....


The color image also changes!

How do I get around this?
Or is there a plug in somewhere that sorts this out perhaps?

Sensei
02-12-2019, 04:58 AM
The color image also changes!

Check color-space settings..

ianay
02-12-2019, 05:14 AM
Sounds easy enough but....
I have no idea what color-space settings are
I recently jumped from 9.6 to 2018 so im assuming ive missed something out here

Sensei
02-12-2019, 05:55 AM
In Layout/Modeler, press 'o' to open Options, there is tab "CS" (Color-Space). That's where you can control color-spaces globally. Also there are options in Image Editor, for each image, Color Space RGB and Color Space Alpha.
https://en.wikipedia.org/wiki/RGB_color_space

If you're using image for bump and normal, color-space must be adjusted to the right one, otherwise you will have issues.

People started to have issues after LW 2015, when CS has been introduced. Like discussion here:
https://forums.newtek.com/showthread.php?145007-Normal-Map-broken-LW-2015-1-Win8-1

Tim Parsons
02-12-2019, 08:11 AM
Im pretty sure this is a simple issue to resolve but its doing my head in!
When I have bump map with an image color surface, I desaturate the image then... Heres where the problem starts
I copy the the color layer then paste it onto my bump surface, then replace the image in the bump map with the desaturated image.. (its either that or copy down all the scale, position,rotation etc values)
But....


The color image also changes!

How do I get around this?
Or is there a plug in somewhere that sorts this out perhaps?

Just using a desaturated color image is not the best for a bump map. (Not that I have done the same. :)) But if that is the workflow you want to use go the nodal route and use the "Color Tool" node in between you color (texture) and your bump input. The "Color Tool" node can desaturate your image on the fly and with that node and don't have to copy anything just route it to the bump. Also you may want to download the free DB&W "Simple Color Corrector" it's the "Color Tool" on steroids.

RebelHill
02-12-2019, 08:43 AM
No need for that even, image node has luma (which is the same as the image at sat 0) and bump output, no need for any conversion.

ianay, be sure to watch...

https://www.youtube.com/playlist?list=PL1C4072533A16B807

and

https://www.youtube.com/playlist?list=PLTds3QePYrWFKQSaSWGMnKF7-4W84I5Tz

if you need an intro to this stuff.

Tim Parsons
02-12-2019, 08:56 AM
Yep - that too. :) Unfortunately when converting from standard to principled you get that old layered image node.