When comparing Normal Map Inspector vs Substance Bitmap2Material, the Slant community recommends Substance Bitmap2Material for most people. In the question“What are the best programs for making height maps, normal maps, and/or other maps?” Substance Bitmap2Material is ranked 4th while Normal Map Inspector is ranked 8th. The most important reason people chose Substance Bitmap2Material is:
B2M generates any output that you may need from a single image automatically (base color, normal, metallic, roughness, ambient occlusion).
Specs
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Pros
Pro Great for pixel art
Pro Works with Aseprite
Pro You can write your own plugins so it works with your favorite graphic design app
Pro Generates several outputs from a single image
B2M generates any output that you may need from a single image automatically (base color, normal, metallic, roughness, ambient occlusion).
Cons
Con Comes at a price
Sets you back over 100 dollars.
Con Not a complete tool
B2M will only allow you to create a normal map from an existing image. You cannot create a custom texture from scratch with it.