vetex color tutorial

Are there any good vetex color tutorials out there?
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http://download.blender.org/documentation/NaN_docs/Manual2.0/VertexPaintButtons.html

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wheres the vertex paint button in 2.3?

in 2.30 there is a drop down menu with choices, one is vertex paint
texture paint is there too
(and face select mode)
usually you see object or edit mode there

the v key works too
(f for face mode)

(the paint buttons are with the edit buttons in 2.30)

Thanks for the link.
the problem is:
after you painted some color to the vertices, for example, add a cube, subdivide once, and paint some red color to the center vertex, and paint some green color to the four corner vertices, you will see some color follow the edges, in another word, if you painted the whole cube, you will notice the polygon structure behind the vertex color. I am looking for a better “blending” inbetween vertices. Any ideas?

I cannot tell you more than :practice. Learn to use soft and at first dont paint with an intense brush or a big one. Learn what can be done and what can’t. When drawing, nobody ask to a charcoal stick to do the job of a pen. If you want more control, paint your textures in Pixia, Painter, the Gimp…

Here’s an example of a small flower modeled and vertex painted in Blender.
You can see that, in spite of having only a few vertices it still can be painted very fluidly and render nicely (forgive the .jpeg artifacts)

See how few vertices it has.

A view in OpenGL so you can see that it is not simple a lighting and rendering trick.

Have fun, take some rest from time to time : you’ll be better when you’ll come back.
I am not, by no stretch of the imagination, an artist. Just a patient old man.

Jean

great.

Thanks so much for this information. Few more questions will really help out my problem completely.

  1. Do you vetex paint directly on the polygon model? Or on the Nurbs?
  2. Do you have bit map textures UV mapped to the flower?
  3. I am looking for a smooth vetex painting without any bit map textures and lighting help.

Looks like a good result could be ahieved.

a PC User who is learning smooth blending vetex paint.

One can’t paint directly on Nurbs in blender. It is possible to convert them to meshes using alt+C once we’re satisfied that we’re finished with the modeling.

  1. Do you have bit map textures UV mapped to the flower?

No, just vertex painting and nothing more.

  1. I am looking for a smooth vetex painting without any bit map textures and lighting help.

You can have that but within limits of the tool.

I have one question too : are you working for something to use in the real time engine or for renderint stills/animations ?

I’ll tell you a bit more if you don’t mind.

After some 16 months in Blender I almost never use the RGB sliders anymore for setting the color ; rather I paint and click the V Col paint button so the color of the object will be what I painted.
I save often : my files are named 'this_project’000.blend and up… I hit F2 > Numpad + (to increment the file number by 1)> Enter

Although I can imagine that some projects would require no more texturing than this, most will. Nevertheless there are still advantages to vertex painting first :
—it forces you to model with the painting in mind and both should go hand in hand anyway : a model should always be easy to texture and if it is paintable it most likely will be easy to texture. So when modelling one is texturing a bit and you already know that when texturing your adding a lot of modeling detail to your object.
—vertex paint is easy on the cpu and graphic card so it let you have a good idea of what the finish product will look like at an early stage and it help to make lighting decisions for example, even animation ones when one can see the creases stretches and bumps forming.
—vertex paint shows through the texture, tints it and modulates it, makes it look much richer than it would have without it.

Looks like a good result could be ahieved.

It’s the artist, not just the tool : a cliché but true nonetheless. :wink:

a PC User who is learning smooth blending vetex paint.

I am very new to this application. I am still on my way to master certain clicks that I need. (Including learning some scripting about camera control,
physics engine use.) So far this application is promising. And I got very friendly technical support from this group.

Thanks so much for this valuable sharing. I see what’s you mean by not using RGB Slider. I don’t like that slider at all. It’s slow.

hit V and right click to get the color is much faster.
I am thinking about using the real time engine to view the painting result.
So I am afraid of using any bit maps. For I am not sure if the engine is powerful enough to handle both.

But I still have problem to achieve smooth blending color between the vertices. It’s not a real painting yet. It’s still a technical test. I hope I could upload a jpeg for you to see what I mean.(I can’t at the moment) So I will try my best to describe it again.

Zoom in pretty close to the polygon grid, and they are painted by one white color(doesn’t matter what color), you see along the edges are whiter(like a neon effect in photoshop). the area closed by 4 edges are slightly darker. I am using the smallest brush size which is 2, opacity is 0.2 by default, “mix” and “soft” are clicked.
and I keep on clicking at the darker area, nothing seems happened.

It seems that you discovered something I don’t know…
I was refering to the RGB sliders (plural) in the material buttons (F5) and the V Col button there too because I don’t do only real time engine.
I’d like if you’d further explain what you meant : might be interesting for me…

I am thinking about using the real time engine to view the painting result.

If it is just a matter of viewing the result the OpenGL shading mode (alt+Z) in the 3D window might be enough for you. With alt+A you even can see the animation, if you have it, in the window where’s your pointer…
Furthermore, if you’re modelling for the real time engine you can set the faces of your model to react to the lighting in the OpenGL shading mode.

So I am afraid of using any bit maps. For I am not sure if the engine is powerful enough to handle both.

I all depend on your graphic card or that of your target audience.

But I still have problem to achieve smooth blending color between the vertices.

Use low opacity setting and lots of patience. You’ll develop tricks.

Zoom in pretty close to the polygon grid, and they are painted by one white color(doesn’t matter what color), you see along the edges are whiter(like a neon effect in photoshop). the area closed by 4 edges are slightly darker.

It take some time to get used to that tool because we think in terms of face painting while we can only change the color of the vertices, a lot or less, and the surrounding faces will all change color. It is a bit like watercolors except that there are just a few places, the vertices that will take the paint. Not easy, something to learn really.

I am using the smallest brush size which is 2

Brush size matter only in the measure that bigger sizes might touch to many vertices at once.

, opacity is 0.2 by default,

opacity influence the speed for the effect to reach it full force. You can get as opaque a color with a low setting than a high one : it will just take more time. Hence the name as a high setting won’t leave you enough time paint with a light touch.

“mix” and “soft” are clicked.

‘Mix’ is a bit of a misnomer since it will completely overtake the former color if you paint long enough or use a high opacity.
‘Soft’ is fine for the soft effect you are after.

and I keep on clicking at the darker area, nothing seems happened.

With your settings, mostly ‘mix’, one paints on a dark color only with a lighter one.
Another cause might be that you click on a vertex without moving while keeping the button pressed, which you must do for the color to start to come… don’t know why though. :-?
Lastly, you can’t paint on a surface when normals is set if the vertices normals are pointing away from you.

Keep at it.

Jean

Again, thanks for your time and input.
I think I have passed the technical research. It’s all good regarding vetex painting. (What I asked is probably too much, I will try to work around the blending color thing.)

What I mean by the RGB slider is: hit ‘v’ and select the paint button,
the slider that you can select color to paint the vetex. rm click allow you to select any desktop color.

:smiley: