The question of the hour is: How to make a transparent block with a visible outline? I am trying to make a platform who's outline is visible and it can't be stepped on. upon flipping a switch the block becomes solid. How can I make it invisible, but still have an out line? I've seen some solutions using shaders, but I have absolutely no clue how to manipulate that code. Or how I could turn it off when hitting a button. Any ideas?
Answer by Lo0NuhtiK
May 22, 2012 at 11:37 AM
A quick way be to just make a 32x32 image with a transparent background and a thin border (2px on mine) around the edges. Then make a material (transparent diffuse shader) and use that image for the texture. Then your box is transparent with a border. When looking 'through' the box, you won't see the other sides border's. Only see the borders on the outside of the box.
I tried making a texture in photoshop, the top layer being a dotted line for the outline, then the 2nd layer behind that had 0% fill. I added it to a transparent diffuse shader but the box still had a white fill on the face facing the camera, then a semi transparent for all the others, I can see inside the cube but I can't see through the cube. Any thoughts on that?
Don't know. Worked fine for me.
How did you make the initial image?
Used GIMP, made a 32x32 image with transparent background, then lined the edges with 2px color border. Exported as .png .
So is it on 2 Layers or one?
Answer by kirpigiller
May 22, 2012 at 03:05 PM
You can try to use Alpha mask. For example, render your mesh with ColorMask A and Blend One Zero, then render the same but slightly scaled with ColorMask RGB(A) and Blend DstAlpha OneMinusDstAlpha.
Based on the number of things in here that I didn't understand, it sounds like it could work. I'm going to assume this has to deal with writing a shader script, as of yet I have no clue how to do that, I am looking that up now. And not that I want to be spoon fed, but, could you please provide a slightly dumbed down example?
Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.
The best place to ask and answer questions about development with Unity.
To help users post good questions and use the site effectively we have posted a user guide.
If you are a new user, check out our FAQ for more information.
If you are a moderator, see our Moderator Guidelines page.
We are making improvements to UA, see the list of changes.
For troubleshooting common problems with Unity 5.x Editor (including Win 10).
Answers and Comments
8 People are following this question.
Edge outline & 2D shadow Shader for planar mesh
can you make a surface shader be drawn before or after a certain pass?
Adding Outline to a Curved Shader
Outline diffuse shader (toon) : no results?
Outlined Shader Shadows