I need help with a live a surface shader camera projection. This video, using maya, shows exactly what I want to do in blender: https://www.youtube.com/watch?time_continue=1&v=JsnPYpDqhRk
would be thankful for any help
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3 Answers
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You need the UV Project Modifier.
- Make a Material with your Texture
- In the Object Data Tab of the Properties create a new UV Map
- In the Modifier Tab add the UV Project Modifier, select your Image and your UV and check Override Image.
- Add a new Camera to the Scene and put it in the UV Project Modifier Tab as Projector
- Go into Textured Mode (AltZ)
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$\begingroup$ unfortunately the projection stops when going into edit mode. I guess there is no solution for this huh? $\endgroup$– Ryan WeMar 11, 2018 at 16:06
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$\begingroup$ no just activate that little button in the header of the Modifier for activating it in Editmode. I tried it and it work absolutely fine. $\endgroup$– HenrikDMar 11, 2018 at 16:08
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$\begingroup$ alright its working. i found out before adding the modifier the object has already to be in edit mode. if not the button you mentioned is not working. at least in my blender version $\endgroup$– Ryan WeMar 11, 2018 at 16:25
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The accepted answer suffers from distorsion because it only ensures that the projection is correct at the vertices but not in the middle of faces, which is a problem for coarse meshes. Here is a shader that precisely does camera mapping with live update:
Usage: Use the Object output of the Texture Coordinates nodes with the object being set to the projection camera. Fov, Width and Height must also match the projection camera.
Details:
A. Projection
B. Apply Field of View
C. Apply Aspect Ratio
D. Remap from [-1,1] to [0,1]
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$\begingroup$ The best camera mapping I have seen. Thank you ... with a few drivers very powerful shader blender.stackexchange.com/a/226920/2214 $\endgroup$– vkliduJun 8, 2021 at 13:00
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This is the node tree you are looking for :
To apply on a selection only, use material assignment or vertex colors.
