Cyberpunk special effect shader

A little sci-fi special effect villain about learning teachers shader Learning from

It is mainly through the triangular wave function as a dynamic texture for transparent and opaque over transformation , Then by superimposing noise texture on this basis , So as to make it more diversified . Finally through smoothstep Function to change its x To achieve different levels of mutation transition . On the basis of this mask , Add the vertex to the direction of the normal to produce an outward expansion effect .

                float4 EffectAnim(float noise, float mask, float3 normal, inout float3 vertex){
                    float baseMask = abs(frac(vertex.y * _EffectParams.x - _Time.x * _EffectParams.y) - 0.5) * 2.0;// Calculate base texture 
                    baseMask = min(1.0, baseMask * 2.0);
                    baseMask += (noise - 0.5) * _EffectParams.z;    // Superimpose the noise texture on the procedural texture created earlier 
                   // The distortion degree of each level of the special effect mask 
                    float4 effectMask = float4(0.0,0.0,0.0,0.0);
                    effectMask.x = smoothstep(0.0,0.9, baseMask);   // Restrict mutation to 0-0.9 Between 
                    effectMask.y = smoothstep(0.2, 0.7, baseMask);
                    effectMask.z = smoothstep(0.4, 0.5, baseMask);  // Restrict mutation to 0.4-0.5 Between 
                    // Vertex colors are stored in the mask 
                    effectMask.w = mask;

                    vertex.xz += normal.xz * (1 - effectMask.y) * _EffectParams.w * mask;

                    return effectMask;
                }       

This function acts on the vertex shader In , And before using, we must sample the noise texture to get the noise information .

In pixels shader in , First, use the texture of the special effect uv1 To sample , Because to realize the whole villain is to make a special effect transition from bottom to top , If you divide the villain into heads with the original 、 I'm not uv0 Coordinates will produce light bands on the head and body at the same time , Not quite in line with the desired effect , So open another uv Space to store the information of the whole villain .

Set parameters to receive the information of different mask mutations in the output structure after using the above function . When using this transparent mask , The corresponding transparency needs to be normalized .

Luminescence is obtained by multiplying the area of intermediate transformation by the part of grid lines that you want to emit light , And take advantage of yourself to play pow Function functions

                    // Special effects part 
                    float3 var_EffectTex = tex2D(_EffectTex, i.uv1).xyz;
                    float meshMask = var_EffectTex.x;
                    float randomDisappearMask = var_EffectTex.y;
                    float slopMask = var_EffectTex.z;

                    float smallMask = i.EffectMask.x;
                    float middleMask = i.EffectMask.y;
                    float bigMask = i.EffectMask.z;
                    float baseMask = i.EffectMask.w;

                    float bigOpacity = saturate(floor( randomDisappearMask + middleMask));
                    float middleOpacity = saturate(floor( slopMask + bigMask));
                    float opacity =  lerp(1.0, min(bigOpacity, middleOpacity), baseMask);

                    float meshEmission = (bigMask - smallMask)* meshMask ;
                    meshEmission = meshEmission * meshEmission ;
                    emission += _EffectCol * meshEmission * baseMask;

Different x Mask of range ：

bigMask：

middleMask：

smallMask：

  You can see that the effect is getting softer .