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How to know the best value of extrude and ray distance while baking a normal map from low poly to high poly model?

The Extrude value that you need to choose will depend on how much (in scene units) the object you need to bake go through the object that bakes (by the way, make sure that you've applied the scale of ...
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How to know the best value of extrude and ray distance while baking a normal map from low poly to high poly model?

For a really good bake, you can use a Cage object. Hit the Bake > Selected To Active > Cage checkbox. Now you can choose a Cage object. During the bake, rays are projected from the cage object ...
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Weird normals in Blender, why? Imported textures from Substance

i forgot to turn on displacement and bump in cycles settings. this fixed it right up
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Normal Map problem - looks low poly

Shade smooth both. Use a sub div modifier in high poly if needed
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Seams appear in blender but not in substance painter. Something to do with directX normal maps

OpenGL uses Y+ for it's normal calculations (first pixel at bottom going "up") whereas DirectX uses Y- (first pixel at top going "down"). Here is the method for DirectX to OpenGL ...
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Normal map bake is not seamless after UV unwrapping character

When setting the normal map texture it needs to be set as non colour data before bake
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inpainting for atlas/texture map

Here are some related keywords/links: Texture Padding, Solidify in Free Plug-ins and Seam Fixing; TexTools for Blender.
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