pass through texture (model becomes silhouette)

Unity Engine
1

Is it possible to do a shader to produce the following effect? (iOS) (as if it’s being drawn flatly through the cube regardless of it’s UV channel)

629056--22445--$cube.jpg

629056--22446--$texture.jpg
629056--22446--$texture.jpg256×512 10.4 KB

2

is it even possible? Not sure of the technical term for this but was done quite a lot on the Amiga and PS1

3

Might be able to use ComputeScreenPos(v.vertex) or the iOS equivalent - and feed that through as the UVs?

4

exactly,

if you pass a ComputeScreenPos(o.pos) to the per pixel processing (with a scale and offset), then lookup that Ramp texture with e.g. perPixelOPosScaledAndOffset.y you will get the desired effect.

5

For some reason I had a hard time finding this thread, but it should be very close to what you want.

6 
Shader "Simple/Silhouette" {
    Properties {
        _MainTex ("Base", 2D) = "white" { TexGen EyeLinear }
    }
    SubShader {
        Pass {
            SetTexture [_MainTex] {}
        }
    }
}

:expressionless:

7

As explained in the other thread, you’ll need to do perspective division in the fragment shader if you want to avoid distortion from sampler perspective correction.

8

Cheers samland, that did the trick!