I am trying to bake texture for a model, and I get the infamous error "No objects or images to bake to". I have done a lot of googling to try and solve this, and in particular I have read pretty much every post related to that on this forum. It does not help and I still get the error. Here below are some details - please ask for more if necessary. Any help would be hugely appreciated.
Set up: I have an obj file, in the same folder as an mtl file along with a jpg picture for the texutre.
Import: I open up Blender 2.7 on Linux, default mode, delete the cube and subsequently import the obj file; I can see it alright and I recenter it.
Texture: in the materials and texture tabs, I select the jpg image for texture, so that when I set the viewport shading to texture I see the texture on the 3D model view.
Bake: making sure that coordinates is set to UV and that Map is set to UVMap in the Mappin dropdown menu of the Texture tab, I then go to the Render tab to the Bake dropdown menu. I click the Bake to Color vertices and choose Texture in the rollout. Clicking bake then yields the error.
Details: I make sure that the object is selected, both in the 3D viewport and in the Outliner. In the latter, the icons are on (the eye, the pointer and the camera). I have also been careful enough to open up a second subwindow for the UV/Image editor, and in there I select the jpg image for texture that is in the folder, and I can see the UV map alright. Also, this is all with the Blender Render engine, not with cycles.
What I have in mind after all this, and the reason I want to do it, is that I ultimately want to export the model to a ply file in a way that all vertices are listed together with an RGB color for each vertex, which is impossible currently (because color/texture is associated to faces of the mesh and not to vertices), even if I tick the "include vertex color" option in the ply export.
Thanks a looot in advance. I am absolutely out of resources here.
Edit: the thread How to bake ambient occlusion into vertex colors? is different I believe. My question is more specific. However the answer to that thread does include what I was missing: adding a set of vertex colors under the object data tab.