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In addition to normal material shading, Blender offers a Vertex painting, which is a painting method that is used where each vertex of the mesh is assigned a separate color. To enter a Vertex color painting, you first have to tell Blender in the Material Settings for that particular object, in this case the butterfly wing, that we want to paint it and then we enter Vertex Painting Mode. When we do that over here in the Editing panel, we have a couple of things that change.
One is in the Mesh panel here under Vertex Color, we have a Vertex Color layer and we now have a Paint panel when we are in the Vertex Paint Mode that gives us fine control over our paintbrush. If we press N we get a Paint Properties panel that pops up and I have one down here in this window here. That allows us to rapidly change our color that we're using. So now all you'd need to do is just paint in the colors. In this case, we're going to make the butterfly have a little pretty red edge to, a beautiful blue in the background.
Since I'm painting the Vertex colors, I need to have enough vertices to paint. So sometimes you might have to add a Multires level to your objects so that you create more virtual, more real vertices that you can then paint on. So now I'm just going to paint the back a little bit here and since I can spin the model around, this is really just like painting in 3D as if I had the model here and I had a little Airbrush. Speaking of Airbrush, that's the Spray control over here that's enabled.
That keeps applying the paint as long as I keep the mouse down. In addition, I have a Vertex Swatch here. So just by clicking the swatch, I can click the Eyedropper Sampler and perhaps sample, if I had over here a UV image of a real butterfly, I could be sampling real butterfly colors and painting them in real time over here. Otherwise, I can use these RGB sliders to set whatever color I want. The other control is the Opacity control, which controls how thick the paint is and the size of the brush that I'm using.
I can yield from a very broad brush to a very fine brush. You can pick up the colors and we'd use them in painting. In addition to mixing the whatever color of my brush with whatever existing color there is, I can instead set the Mix most to Add where this color adds on to whatever existing color is there and that provides little bright highlights. I can Subtract which actually darkens the colors. I can Multiply or Blur the colors together in which case now, my brush access a blending brush to blend these colors together into a nice smooth gradient.
I can also provide on the fly, Multiplying and Gamma correction to my colors, just by clicking the Set button there, and that lightens up all of these colors to make a very happy pastel kind of colored butterfly. And that's a quicker review of Vertex painting in Blender that allows you to provide much finer control and more of an artistic paintbrush feel to you models in Blender.
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