I liked how this nose turned out, so I thought I'd post my wip images in this thread. This is how I approach a dog's nose on claybord / whiteboard.
1: Underpainting. I like to use ampersand inks. I try to avoid any smooth lines at places of value changes or margins (like hair to skin), they're very hard to scratch out later. I spackled a little dark sepia on the nose for added texture in this one (see tiny, dark dots!). Be sure to make the underpainting much darker/richer than you intend the final image to be.
2: Fixing errors. They happen, inevitably. This is why I love claybord, you can fix just about anything. So using a fibreglass brush I lightly removed some of the ink and repainted... changing the shape of the top of the nose as well as moving the philtrum and lip angle.
And voila! We're back in business! And on to the next step (finally)...
3: starting to scratch! I lovelovelove the tiny hairs around a dog or cat nose! Notice that the line of scratching is what will give the nose definition - not the colour change on the underpainting. The haired skin usually has a soft margin of darker colour adjacent to the pigmented nose. If you haven't used claybord keep in mind that your ink washes are not as thick as the surface of regular black scratchboard - when in doubt go EXTRA lighthanded. On the first layer you will scratch back to white and can do light washes to tone down the contrast - on subsequent ink layers you ideally you want to scratch back only to the ink underneath, this will give you a wonderful varigated range of values!
4: More hair
5: Nose texture - this can range from simple pontillation to small circular squigglies (showing here) or a more faithful scratching of the tiny cobblestones of the nose surface. This nose was meant to be more smooth so my 'cobbles' are more subtle and spaced widely. I generally put the most individual 'cobbles' on the top and center of the nasal planum, more subtle fine texture on the shadowed and lower parts (which are naturally smoother on the real dog). There is some scratching even on the deeper shadows - these will be inked over with a shade ~slightly~ lighter than the base coat, this keeps the depths visually appearing continuous with the rest of the nose. Also, dog noses have a LOT of topography, the more you can keep those wrinkles and curves the more convincing the final nose will be.
6: It looks like I missed a WIP shot in there - but essentially the cobbles are inked over with light washes (lighter than the background ink colour). Then the nose is reworked with a small fibreglass brush in a sort of macro pontillated fashion - taking away some of the ink in a mottled way. You can see that in some areas the 'cobbles' are lost, but the subtle variation those scratches make in the ink washes over them still adds more depth than if you'd just scratched the areas that will show.
The hairs of the muzzle have also gotten a light wash or two of ink to tone down the contrast.
7: More shading put in - and there is your final nose!
Full image here
So go grab a whiteboard and have some fun!!
~ Boots ~