Timeline for How are tangent and bitangent calculated?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| May 15, 2022 at 17:33 | vote | accept | tempdev nova | ||
| May 15, 2022 at 17:14 | comment | added | scurest | I believe it uses the tangents from the UV map you set on the Normal Map node. I don't know what it does if there isn't a UV map. In Python, it won't let you calc tangents if there isn't one. | |
| May 15, 2022 at 17:05 | comment | added | tempdev nova | If I have multiple Textures with UV maps will, which I can access through the UV node, will Blender be smart enough to take the correct UV map for each texture each time or does it always only take the active UV map? | |
| May 15, 2022 at 17:04 | comment | added | tempdev nova |
The tangent and bitangent are computed from a UV map (that's why you need one to get tangents) But what if my mesh doesn't have any UV maps? There have been cases where I used a procedural noise as input for the normal map node and it worked perfectly fine, although the mesh didn't have any UV maps available.
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| May 15, 2022 at 16:59 | history | answered | scurest | CC BY-SA 4.0 |