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I'm trying to get these hatches to bake as normals onto the bodywork under them so I don't need to have the game render the whole thing. (obviously. :P ) Unfortunately I'm still VERY new at this and this is the first time I've ever tried to bake a normal map, usually I just model the stuff I want. I followed various tutorials but it never seems to come out anything like what I want. I assume I've buggered up either the modelling or the settings for the bake. All the normals are orientated the right way (Blue). Can anyone give me a quick run down of the step by step to get this to work? Any help would be much appreciated! :)

Thanks so much!

The hatches I'd like to use as normals.

enter image description here

The bodywork under the hatches, unwrapped and ready to go, in theory. enter image description here

One of the results that baking brings. enter image description here Attempt number 2. enter image description here

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  • $\begingroup$ if your shapes are completely parallel or perpendicular to the faces that are baking, you won't have any result as baking the normals will only take face orientation into consideration (parallel or perpendicular can't be baked), it may be the problem here? I don't know why you have the second result though... Maybe share your file? pasteall.org/blend $\endgroup$
    – moonboots
    Jun 22, 2021 at 8:23
  • $\begingroup$ pasteall.org/blend/5ed48387e5fb4baf864ed16ba1ac33d8 So it wouldn't be able to baked the raised hatches onto the side of the body work? :/ $\endgroup$
    – Bhaal
    Jun 22, 2021 at 8:33

1 Answer 1

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What you could do is duplicate your main object, you'll call the duplication the "high-poly", boolean it with your hatches so that you get that:

enter image description here

If the faces of the high-poly are parallel of perpendicular to the faces of the low-poly that are baking, the bake won't catch anything as baking normals is supposed to record the orientation of the faces (perpendicular or parallel faces won't be recorded and will remain blue):

enter image description here

So scale the hatches face down a bit so that their sides are not completely perpendicular to the wall faces that will bake them:

enter image description here

Choose the Selected to Active option. Give a bit of Extrusion to the bake (like 0.1) because the faces of the hatches of the high-poly go a bit beyond the surface of the low-poly, so you need to make the bake start a bit before the faces of the low-poly. Now if you bake you'll get this:

enter image description here

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  • $\begingroup$ Ahhh well explained, thank you! That's gotten most of it working, one side worked perfectly, the other side is yellow-y brown? imgur.com/a/xZUfjzb $\endgroup$
    – Bhaal
    Jun 22, 2021 at 9:33
  • $\begingroup$ it looks like inverted normals? maybe share your file again $\endgroup$
    – moonboots
    Jun 22, 2021 at 9:45
  • $\begingroup$ pasteall.org/blend/7c87946a3ad54e4b95e22d2f9a9bea23 There you go. :) They seem fine to me? They aren't red, i assume thats what you mean? :) Thank you so much for the help, it's much appreciated. $\endgroup$
    – Bhaal
    Jun 22, 2021 at 9:53
  • $\begingroup$ increase the extrusion value a bit, like 0.05. Also unplug the Normal map of the high poly material $\endgroup$
    – moonboots
    Jun 22, 2021 at 10:05
  • $\begingroup$ Ahh that's got it. So just fiddle with that value if it doesn't display quite right? :) Do I need to do anything with 'Max Ray Distance'? I just left it on 0. $\endgroup$
    – Bhaal
    Jun 22, 2021 at 10:11

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