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Added the bit about reflections and shadows.
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edit approved Aug 29, 2015 at 7:07
Grant
edit approved Aug 29, 2015 at 7:07
Grant
  • 11
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Material that shows up as alpha channel on render, but shows up in reflections

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

EDIT: I'm using Cycles.

EDIT EDIT: Thank you for your answer, Denis. I realized today that there's one thing missing from the solution you provided. I also need the object to cast shadows and show up in reflections. I can't quite get my head around to make that happen. Any help out there?

EDIT EDIT EDIT: Figured it out! enter image description here

Material that shows up as alpha channel on render

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

EDIT: I'm using Cycles.

Material that shows up as alpha channel on render, but shows up in reflections

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

EDIT: I'm using Cycles.

EDIT EDIT: Thank you for your answer, Denis. I realized today that there's one thing missing from the solution you provided. I also need the object to cast shadows and show up in reflections. I can't quite get my head around to make that happen. Any help out there?

EDIT EDIT EDIT: Figured it out! enter image description here

Can't comment to answer a question, so I'm updating here.
Source Link
edit approved Aug 27, 2015 at 19:52
Grant
edit approved Aug 27, 2015 at 19:52
Grant
  • 11
  • 4

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

EDIT: I'm using Cycles.

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!

EDIT: I'm using Cycles.

Post Closed as "Duplicate" by gandalf3
Source Link
Grant
Grant
  • 31
  • 1

Material that shows up as alpha channel on render

Another way to put it is that I want to create a material that will do the cropping for me.

If I apply this shader to a cube in the middle of the shot, then my render will have a cube-shaped block of transparency in the middle of the shot, even if there are objects behind the cube.

Can anyone provide me a pointer on this? I'm new to nodes.

Thank you thank you!