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I really hope someone can answer this because I've looked all over and cannot seem to find the answer/solution that fits my problem; or maybe I just don't understand how "baking" works.

I created a model in blender, unwrapped it, exported it as .fbx into Substance Painter and added my textures there. I then exported those textures to Blender and applied them using the node setup pictured.

My texture is visible in render and fits the object correctly. All textures: image, normal map, reflection map, etc. work correctly and render properly.

My problem? I'm building models to export to Unity for a game and I don't want the game engine rendering everything so I want to save time by baking my textures onto the object. If I just connect a single image texture node to the material output it will render and I get a usable baked texture. But with the node setup pictured it just renders black to the image I'm baking to.(pictured)

My question: Am I trying to hard? What all do I actually need to bake onto an object to be helpful in Unity? Can I bake normals, reflection map, etc. onto a single image texture in the first place? Should they all be baked separately and attached to the object in Unity? Can my above node setup be solved in order to render everything onto a single image texture?

I know it's a lot and I have looked at "workflow" guides but I do not understand where I'm going wrong here. Any help is appreciated.

My set up.

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    $\begingroup$ Honestly I am quite confused about what you want to achieve in the first place. You modelled the barrel in Blender, you created the textures in Substance Painter and now you are going back into Blender to ... uhm... do what? There is actually nothing left to bake if you have all the textures already. Why not import your fbx and your textures into unity and create the material there? $\endgroup$ – metaphor_set Feb 24 '18 at 2:58
  • $\begingroup$ That's what I was wondering, whether I should just assemble it in Unity. I did a test run and it looks great. But I want to do all my lighting in blender than carry that over as a baked on texture. To achieve this, do I just bake onto the basic image layer without worrying about the normal maps etc? Example: I have a plane for a wall with a normal map and image texture on it. I light the scene and want to bake the light result onto an image to use as a texture in unity. Is that not possible? $\endgroup$ – lordrykon Feb 24 '18 at 3:30
  • $\begingroup$ " Can I bake normals, reflection map, etc. onto a single image texture in the first place?" no. "Should they all be baked separately and attached to the object in Unity" they already exist as images you exported from Substance. I don't see why baking once more. $\endgroup$ – Mr Zak May 11 at 12:59
  • $\begingroup$ He wants to know if it's good practice to bake scene lighting/GI over the individual asset texture maps $\endgroup$ – Dr. Farquaad May 11 at 14:13
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Wouldn't it be a simple light problem...

If your lights are not setup wright as you want your scene to be lit, then you have nothing to bake since the texture you already have...I guess what you want is to have the object lighten as it would be if you put some dynamic lighting in Unity...

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