Amazing tutorial! Straight to the point and well explained. For anyone else using Godot 3, you can adapt this verbatim and just remove line 4 of the shader for it to work!
I have followed this exactly and everything matches. However I get an error on the ALBEDO = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb; Unknown identifier in expression: 'ALBEDO' I have no idea what is wrong and this isn't the first time I've had to give up on a shader tutorial because of a very similar error no one else seems to get. Does anyone have any idea what could be wrong?
OMG in case anyone comes along after me with the same issue, My auto generated template had both void vertex() and void fragment() as default functions. If you put it in the vertex one you get my error, make sure you put it within void fragment()!!!
Godot's stencil buffer isn't still merged for years, despite approved half year ago. All I can do now is this while my target mesh corresponding to water in this vid has no transparency, so I need to mark it as transparent to make this work. Not sure what's more costy on GPU tho, entire ship mesh being drawn without optimizations opaque gives or upcoming stencil buffer..
I was looking into buoyancy(because I got sidetracked) so I look forward to seeing it, although every tutorial I've seen out there takes a similar approach.
This helped me figure out (at least a temporary) solution with rendering a player behind a building, with some minor changes to geometry transparency and draw modes. Thanks a bunch!
This is extremely clever but seems flimsy? what if the limitation is removed in a future version of Godot? someone might be very well justified in calling this feature a bug. Could you achieve the same thing by sampling the screen texture and setting all the desired eliminated objects to a lower render priority?
I know I'm very late, but I don't feel like this will be touched upon too much for awhile, and if it does major engine changes are coming anyway. As of right now this isn't a bug, it's just how the engine works with render priorities, and it's very easy to work with. you can even show other transparent shapes inside of this mask. I was concerned as well, but I think the video makes it out to be more of a bug, when in reality it's how the engine intentionally handles the order in which materials are drawn
This is so dead simple, yet I can't get it to work in my project. No idea why. Oddly enough, it'll mask a Sprite3D, but not another MeshInstance. But for some reason, if I set "Transparency" to anything other than 0 on the MeshInstance I'm trying to mask through, THEN it works, but then my mesh is transparent. EDIT: Found that if I set "Transparency" in the Surface Material of my mesh to "Alpha", then this works normally. Still not sure why that was necessary.
that's because your mesh was being rendered as opaque, which means it appears in the screen texture. only meshes that rendered with transparency are invisible through screen textures. setting the transparency to Alpha forced it to be part of the transparent renders, and so that's why it worked then
so let's say i want to be able to see my character's eyebrows through the hair, i would have to give a bit of transparency to the hair mesh in order for this to work, right?
Amazing tutorial! Straight to the point and well explained.
For anyone else using Godot 3, you can adapt this verbatim and just remove line 4 of the shader for it to work!
This is one of those tutorials I will certainly come back to a few times!
lovely
short and to the point
I have followed this exactly and everything matches. However I get an error on the ALBEDO = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
Unknown identifier in expression: 'ALBEDO'
I have no idea what is wrong and this isn't the first time I've had to give up on a shader tutorial because of a very similar error no one else seems to get. Does anyone have any idea what could be wrong?
OMG in case anyone comes along after me with the same issue, My auto generated template had both void vertex() and void fragment() as default functions. If you put it in the vertex one you get my error, make sure you put it within void fragment()!!!
is there a way to apply this to 2D?
For 2D, take a look at the BackBufferCopy node
I don't even use godot, but this was interesting and fun to watch
Godot's stencil buffer isn't still merged for years, despite approved half year ago.
All I can do now is this while my target mesh corresponding to water in this vid has no transparency, so I need to mark it as transparent to make this work.
Not sure what's more costy on GPU tho, entire ship mesh being drawn without optimizations opaque gives or upcoming stencil buffer..
Is it possible to get the mesh to do the opposite of this?
As in: only display the object when it is 'overlapped' by the mesh
thx =)
Is there a method to target specific meshes or materials, not just any that are transparent?
I was looking into buoyancy(because I got sidetracked) so I look forward to seeing it, although every tutorial I've seen out there takes a similar approach.
Thank you for the lesson. Helped me a lot in my work!
very clever...
This helped me figure out (at least a temporary) solution with rendering a player behind a building, with some minor changes to geometry transparency and draw modes. Thanks a bunch!
Would you be able to elaborate on this?
This is extremely clever but seems flimsy? what if the limitation is removed in a future version of Godot? someone might be very well justified in calling this feature a bug. Could you achieve the same thing by sampling the screen texture and setting all the desired eliminated objects to a lower render priority?
For a proper solution, really, we would need Godot to expose the stencil buffer. Hopefully that will come in a later version of 4.X
I know I'm very late, but I don't feel like this will be touched upon too much for awhile, and if it does major engine changes are coming anyway.
As of right now this isn't a bug, it's just how the engine works with render priorities, and it's very easy to work with. you can even show other transparent shapes inside of this mask. I was concerned as well, but I think the video makes it out to be more of a bug, when in reality it's how the engine intentionally handles the order in which materials are drawn
This is amazing! Do you know if there is any way to make 3d masking of only the objects that you want to mask? To have more control over it.
This is so dead simple, yet I can't get it to work in my project. No idea why. Oddly enough, it'll mask a Sprite3D, but not another MeshInstance. But for some reason, if I set "Transparency" to anything other than 0 on the MeshInstance I'm trying to mask through, THEN it works, but then my mesh is transparent.
EDIT: Found that if I set "Transparency" in the Surface Material of my mesh to "Alpha", then this works normally. Still not sure why that was necessary.
that's because your mesh was being rendered as opaque, which means it appears in the screen texture. only meshes that rendered with transparency are invisible through screen textures.
setting the transparency to Alpha forced it to be part of the transparent renders, and so that's why it worked then
Please do multiplayer tutorial you are my savior if you do this!
Is there any form of this for canvas layer shaders, so that they can act on certain 2D textures
Version of the shader code for 3.0?
I'm on 3.6.beta3, so not sure if it would work the same, but I got this to work by just not including line 4.
so let's say i want to be able to see my character's eyebrows through the hair, i would have to give a bit of transparency to the hair mesh in order for this to work, right?
Yep! Transparent objects don't show up in the screen texture.