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I am trying to add an iris to the eye.enter image description here

I go to Object Data / Vertex Groups/ and I click in + . I select the area where I want to put the iris. enter image description here

I go to texture/material and I add my iris. enter image description here and Blender put the iris in the whole eye.enter image description here

I know I miss something but what?

Thanks a lot!

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Idle Chit-chat

Your title says "Cycles Render," but your screenshots are from Blender Internal. Also, in your last screenshot, you need to select 3D Viewport > Toolshelf > Edit > Shading: > Smooth for the eye to not be pixelated in the viewport render.

However, if you are going for realism, I would suggest switching to Cycles Render (much faster, newer, better, AND built for photorealism). So, this tutorial is for Cycles. This will be the final result:

enter image description here

Materials

I will use a sphere to represent the eye (smooth shading), and the following eye texture from Google (full size linked) in my demonstration.

enter image description here

With the sphere selected, go to the Materials tab in the Properties panel. + New a material to the sphere. Go into the Node editor, and use the setup shown.

enter image description here

Now, go to the sphere in the 3D Viewport. Tab into edit mode, Numpad 1 to front view, and Numpad 5 to orthographic view. Enter Face Select Mode. Select these faces:

enter image description here

Press U and select Project from View (Bounds). Split the screen into a 3D Viewport and a UV Image Editor by dragging the marks in the top-right corner to the left. Make sure you are still in edit mode. Open the image of the eye through the toolbar at the bottom of the UV Image Editor. The orange should already be aligned over the eye.

Final Notes

I added the nodes at the bottom to create red veins in the eye. It's more realistic.

Here is the finished .blend file:

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  • $\begingroup$ Thanks @Shady. You are right I took the screeshots in Blender Render. $\endgroup$ – Meri Jun 2 '16 at 14:12
  • $\begingroup$ @Meri You're welcome. Please consider accepting this answer if it helped you. $\endgroup$ – Shady Puck Jun 2 '16 at 14:12
  • $\begingroup$ Hi @Shady please can you tell me where Multiply is in Note Editor? Thanks $\endgroup$ – Meri Jun 2 '16 at 14:38
  • $\begingroup$ Converter > Math. Don't forget to accept, please! $\endgroup$ – Shady Puck Jun 2 '16 at 15:17
  • $\begingroup$ Sorry, yes I am going to accept. Thank you for your help. It is very useful. $\endgroup$ – Meri Jun 2 '16 at 16:51

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