eyes!

[dark poulpo]

hi,
i modify a shader to make any eyes

do u want add this shader to manage the eyes ?

[dark poulpo]

https://www.shadertoy.com/view/XslGR8

[Nadow]

Wow! Pretty impressive!

[rfairhurst]

https://www.shadertoy.com/view/XslGR8

I used the png of the blue eye iris to create a standard eye png in the library. It is static like the other mh eyes, but at least it gives me a nice blue eye (See screen shot) It was not difficult to set up in gimp.

Are you able to produce other color eyes with this shader? Grey, hazel, Amber, etc? http://en.wikipedia.org/wiki/Eye_color Where in the code is color controlled?

[rfairhurst]

Using gimp I have been able to do variants of blue and green from the original iris png above. I am not very happy with the light-brown eyes, but it has some use still. The first is the original (which I am calling light-blue) and the rest are the variants I made with Gimp.

[rfairhurst]

Here is a dark brown with slightly larger pupils as compared to the original brown. I have made them more doe eyed, but that can be lessened without a lot of trouble.

[rfairhurst]

After going to Costco and looking at Black, Asian and Mexican people, their eyes are almost uniformly darkest brown to nearly black eye coloring. This is more true to those races:

[dark poulpo]

After going to Costco and looking at Black, Asian and Mexican people, their eyes are almost uniformly darkest brown to nearly black eye coloring. This is more true to those races:

The attachment darkest-brown.png is no longer available

use the shader in the shadertoy https://www.shadertoy.com/view/XslGR8 and uncomment the //p *= 1.5; // coeff to scale
and change this value to have a good size.

you can change the colors too, to obtain a more realistic effect than "the gimp".

all lines of colors are comment by "// you can invert the color rgb to obtain any colors" in the main()

you must add this pictures to add more effects.

[maksimyang]

where is the .mhstx file?

[duststorm]

I experimented with this shader today and managed to get it into MH without too much effort.
Behold:

Iris shader at work in MH

I extracted some of the color values that you proposed to be editable and made them uniforms so they can be configured.
As you can see on the screenshot the material editor (Utilities > Material Editor tab) allows you to tweak the values and preview them in MH.

Eye shader closeup -- without texture backdrop

I also added the option of using a texture for the white area of the eye, activated by clicking the Diffuse checkbox (which enables diffuse in the shadingConfig, and defines the DIFFUSE preprocessor directive in the shader code).

Eye shader closeup -- with texture backdrop added (check the Diffuse shader config checkbox)

I am just using the default 'brown' eye texture for it, with the iris shader simply replacing the pupil.

You can get the material package here to try it out yourself:

mh_iris_shader.zip

MakeHuman material package for the iris shader. Place this eye material in data/eyes and select it using the material chooser (with eyes seleted).

(4.07 KiB) Downloaded 496 times

You can install it by unpacking the zip file in the makehuman/data/eyes folder in your My Documents or home folder.
Note that this is for the A8 version of makehuman! Get the latest version from svn to try it out.


Dark Poulpo, maybe you're interested in experimenting some more with this?
I have some remarks on improvements. First of all, the number of color parameters is a little much and it's unclear what each does. Maybe you could reduce the number of variables to 1, 2 or 3 at max. I had some succes experimenting with having only one color value. It would be nice if we can change the eye color into green or brown by just setting one or two color values.
Also, there is a visible discontinuity at the center of the eye, where you can clearly see a circle. It's visible when the pupil is not at its largest value. Can you get rid of that? I realize that it is because you want to have a different pattern around the pupil, but maybe it can be blended more gradually with the other pattern.
The pupil itself should probably not be controlled by a time value (MH does not support the concept of time so it is just set to a static value that you can change), but just have a pupilDilation uniform variable that you can set (for example a float between 0 and 1).
It might need a brightness/contrast control. The eye looks a bit bright with the default settings.