Hello,

I am coming to Krita from Blender and looking to use it to paint over images rendered in Cycles. Specifically, I want to paint on the component render passes. A complete Cycles render is composed of several passes or layers. These passes split up different types of shading and their colors. They have to be combined in a certain order, which I am already able to setup in Krita. The setup is:

[(Diffuse Direct + Diffuse Indirect) * Diffuse Color] + [(Glossy Direct + Glossy Indirect) *Glossy Color]

What makes this complicated is that the Direct and Indirect passes have pixel values greater than 1. The color passes have normal color values between 0 and 1.

The Direct and Indirect passes have values between 0 and 5, most of which is between 0 and 2. So after adding them, they are between 0 and 10, but most of that is between 0 and 4. But then they get multiplied by their Color pass, which darkens them, dropping it all down to the 0 to 1 range. So in other words, the final combined image is in normal ranges, but the passes are not.

However, I'm looking to work on the passes individually, as it is very convenient to have your shadows and highlights separate, and each separate from their colors too!

With all this in mind, I have some questions:

1) Is it possible to set a brush's color numerically? ie, choose the specific RGB values of the color rather picking it on a color wheel. This is how I'm used to it working in Blender. It also lets you choose values above 1.

2) If that isn't possible, is there some other way to have a brush that paints a value above 1?

3) Is there a way to view the value or other color info on a specific pixel (another thing you can do in Blender's image viewer.)

Thank you!

If you go to Settings -> Dockers you can tick the Specific Colour Selector box to have that docker on show. This will let you adjust the numerical value of a colour for a variety of colour spaces and bit depths. However, the value of each channel has a maximum of 255, or 100% or 1.00 (or whatever the 'normal' maximum is) so it seems you can't have values beyond this maximum, unless someone knows a clever way of doing it.

If you press and hold the Cntrl key, the on-canvas cursor changes to a colour picker icon with a cross-hairs cursor. You can use this to select colour from a pixel and that colour will be shown in the Specific Colour Selector docker as a numerical and graphic representation.

Currently, you either need to change the exposure for all the docker based color selectors, or use the internal one in the dual color button dialog.

The scene linear manual page describes most related things.

Thank you, it is working!