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enter image description hereHello,

The blender render does give color but not the cycle. How could this be? Is it maybe because of my GPU? (wich i cant select as compute device)

enter image description here

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  • $\begingroup$ I do have RGBA checked in the output section.. $\endgroup$ – Sjors Jan 31 '16 at 14:04
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    $\begingroup$ Did you set up your materials for cycles? Materials for blender internal can't be used when rendering on cycles. $\endgroup$ – user1853 Jan 31 '16 at 14:07
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    $\begingroup$ related: blender.stackexchange.com/questions/364/… $\endgroup$ – user1853 Jan 31 '16 at 14:10
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First of all: using CPU or GPU would not make any difference on the characteristics of the rendered image, other than rendering faster or slower.

I see three possible reasons why you have a black and white image:

  1. You set up materials in blender internal and didn't create materials for cycles.

    When no materials are present cycles will render everything with the default material, which is gray.

Cycles and Blender internal's materials are not compatible or interchangeable. you need to create new ones them using material nodes.

  1. Maybe you did set materials but you set the output to render as B&W. Set it to RGB or RGBA (Red, Green, Blue, Alpha)

    enter image description here

  2. Maybe you did set the materials correctly and the output to RGB (or RGBA), but you set the render layer to use only one material, overriding all of the other materials for the scene:

    enter image description here

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  • $\begingroup$ Ah oke. i did not set specific matterials for cycles. Thanks for the quick and complete answer. $\endgroup$ – Sjors Jan 31 '16 at 16:00
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As Cegaton pointed out, this happens, when you update a scene from blender internal to cycles.

All materials are lost and replaced by a placeholder material that renders gray.

Just go to material tab and start creating new materials.

Edit: I have to correct myself: It is not the case, at least diffuse color is transfered.

Here is a simple scene in blender internal

Internal render with simple materials

Same in cycles

Same in cycles

And here is a screenshot of material tab after changing to cycles. Screenshot of material tab after changing to cycles

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    $\begingroup$ Thanks for the quick response.. But even in the preview the matterials are gray (and when i select a colered one it turns gray).. Sorry if its a dumb question. $\endgroup$ – Sjors Jan 31 '16 at 16:08
  • $\begingroup$ Please upload some screenshots. Material tab with the object selected. Render and Render Layer-Tab would also be helpful. $\endgroup$ – maegmaeg Jan 31 '16 at 16:10
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    $\begingroup$ Does that screenshot tell anything? $\endgroup$ – Sjors Jan 31 '16 at 16:27
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    $\begingroup$ Guys... this is not a forum but a question and answer site. Conversations like this should go to chat $\endgroup$ – user1853 Jan 31 '16 at 17:12
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    $\begingroup$ please read: blender.stackexchange.com/tour $\endgroup$ – user1853 Jan 31 '16 at 17:14
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The main problem seems to be missing material nodes in Cycles. I'll suggest reading the Blender Manual for materials and nodes in Cycles here: https://www.blender.org/manual/render/cycles/nodes/introduction.html.

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