How to solve this baking issue?

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  Eric Chadwick admin

  Dec 6 2025

  What do the UVs look like? Are those seams on UV splits, and if so did you add padding there?
  
  What tool
  are you baking with? What tool are you rendering in? What file formats are you using? What bit depth is the normal map?

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  Neox grand marshal polycounter

  Dec 6 2025

  The issue with this is, too little texture space to compensate for too much shading. Basically you have very strong low poly shading going on. The normalmap tries to compensate but there aren't enough pixels (or bit depth 16bit vs 8bit) to cover it. 
  
  You have 2 options basically
  
  Upping the texture resolution and possibly bit depth 
  
  Or 
  
  Reducing the lowpoly shading
  
  I would opt for the latter, get rid of the long thin triangles. Use some more geo or custom normals to flatten what the normal map has to compensate
  
  Just look at the lowpoly without any normalmap, all that strong smooth shading is what the normalmap needs to carry, help it a bit

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  WangQiang

  Dec 7 2025

  Eric Chadwick, Thank you for your response. The cyan edges in the image represent the hard edges and UV seams. I baked the texture using Marmoset Toolbag, and the issue appears both in Marmoset Toolbag and Substance Painter. As Neox mentioned, I tried it, and it is indeed due to the texture space being too small.

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  WangQiang

  Dec 7 2025

  Neox said:

  The issue with this is, too little texture space to compensate for too much shading. Basically you have very strong low poly shading going on. The normalmap tries to compensate but there aren't enough pixels (or bit depth 16bit vs 8bit) to cover it. 
  
  You have 2 options basically
  
  Upping the texture resolution and possibly bit depth 
  
  Or 
  
  Reducing the lowpoly shading
  
  I would opt for the latter, get rid of the long thin triangles. Use some more geo or custom normals to flatten what the normal map has to compensate
  
  Just look at the lowpoly without any normalmap, all that strong smooth shading is what the normalmap needs to carry, help it a bit

  You've been a huge help. That was indeed the reason, and the issue has been resolved. Thank you so much.

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