Well, one year without posting on this blog, busy with lot of things (family, MOOC, online classes, work…). But I am still practicing 3D, and I actually found some time to post things on G+ and not here. 3Doodle of this weekend, which is making a great wallpaper :
As an animator, you need some references for motion, and luckily the great work of Eadweard Muybridge is floating all around on the Internet (it is in Public Domain in most countries)…
So you have found this nice board showing pictures of a running cat, and you are curious to see how it feels animated, you want to study it in motion…
By using an orthographic camera, the addon “import images as planes” and the auto-key feature of blender, you can very quickly translate the plane frame by frame in camera view (click for animation) : Here is a gif made with gimp from the opengl render output of blender : And here you will find the blend with the texture packed !
Ok, here is a description of one part of my work, teaching things I am still learning ! In this case, digital drawing (or painting if you prefer, and I think you learn about it all your life).
The objective of this post is to give some ideas to people wishing to introduce school children to digital painting but who are a little scared or don’t know where to start !
Based on this making-of by Michel Strombeck I made this image for fun. Skin shader is not as good as I wish, but I have spent enough time on it.
This is my new wallpaper (looks great on lightdm) :
I ended with it after following this great tutorial by Blender Cookie.
The shape is generated from a track by Mogwai (friend of the night) and the glowing rainbow colors are at the opposite of the mood of the music video.
The process is quite interesting, and it makes me working in python, so I will do some similar pictures in near future, trying to catch the spirit of the song with the shapes and the colors.
Here you can get the WQHD picture if you want.
Model of the day, In a classic and colored fashion, made after having seen a tutorial for modeling this kind of furniture in 3DSmax…
Available on blendswap here.
I am playing with the GSOC 2013 paint and I just realised I didn’t used all the tools available in it. But on the other hand I tried something I had never done before and it turned not too bad.
I used mostly the texture mask with the cutoff option (not present in 2.70a and in 2.71RC, but it’s ok without it) to generate a grayscale texture which is used to mix several procedural shaders (and you can use this texture as an input for those shaders, like color variations, roughness variation, etc…).
The thing you need to know is that each mixing shader node has the texture followed by a converter node coloramp as a factor input. Then you have to do the same for the bump, in order to have scratch deep, rust higher or lower than paint, etc… With some organisation it is easily manageable.
Of course it is easier to achieve a good result if you use a tablet and some brush textures. And by using the material mode in the 3D viewport, you can see how you are mixing your materials with pressure variation. Kind of cool ! With a low opacity black brush, It’s like if you were scratching more and more the paint stroke after stroke to reveal the metal !
The more materials you want to mix, the less freedom you have in the value range of your brush, or the more sensible it is… In fact it is defined by your coloramps, and the cool thing is that you can tweak how tight are the transitions between materials after having finished your paint by modifying the colorramps, and you can animate them if you want to show the aging, or change the colors easily (blue or green paint but keeping the metal and rust same color for example)… It is very flexible.
Here is an example of what you can achieve with this method, it could be better but I only painted one grayscale texture.
And here is a blend file with a cube ready to be scratched if you want to test.
I just released a katana model under CC-BY licence on blendswap.
You will find it here.
I decided to render this shot in blender internal. It’s the easy way, but I will render some acting shots in cycles, and perhaps some in mentalray…