do you have a shadertoy version of this for comparison? i took this one by ozzy https://www.shadertoy.com/view/lsSGWw https://www.shadertoy.com/view/lsSGWw and

do you have a shadertoy version of this for comparison? i took this one by ozzy https://www.shadertoy.com/view/lsSGWw https://www.shadertoy.com/view/lsSGWw and tweaked a few things by hand for optimization. saved a few cycles on the code and increased the iterations to 13, which gives a better result. like this: #define ITERATIONS 13.0 #define SPEED 10.0 #define DISPLACEMENT 0.05 #define YOFFSET 0.1 #define YSCALE 0.25 #define FLAMETONE vec3(50.0, 5.0, 1.0) uniform lowp sampler2D source; // this item uniform lowp sampler2D chan0; // random map uniform lowp float qt_Opacity; // inherited opacity of this item varying highp vec2 qt_TexCoord0; uniform highp float time; // shader playback time (in seconds) float noise( in vec3 x ) // iq noise function { vec3 p = floor(x); vec3 f = fract(x); f = f*f*(3.0-2.0*f); vec2 uv = (p.xy+vec2(37.0,17.0)*p.z) + f.xy; vec2 rg = texture2D( chan0, (uv + 0.5)/256.0, -100.0 ).yx; return mix( rg.x, rg.y, f.z ) * 2.0 - 1.0; } void main() { vec2 uv = vec2(qt_TexCoord0.s, (1.0 - qt_TexCoord0.t)); float nx = 0.0; float ny = 0.0; float i; for (i=1.0; i<=ITERATIONS; i = i + 1.0) { float ifrac = i/ITERATIONS; float d = (1.0-ifrac) * DISPLACEMENT; ifrac *= time; float ii = i*i; float y = uv.y*YSCALE*ii - ifrac * SPEED; float x = uv.x*ii; nx += noise( vec3(x-ifrac, y, 0.0)) * d * 2.0; ny += noise( vec3(x+ifrac, y, ifrac/ii)) * d; } uv.x += nx; uv.y += ny; // a blob shape to distort float flame = clamp( sin(uv.x*3.1416) - uv.y+YOFFSET, 0.0, 1.0 ); flame *= flame; // f^2 float ft = flame*flame; // f^4 flame *= ft*ft; // f^10 //lowp vec3 col = pow(flame, TIGHTNESS) * FLAMETONE; lowp vec3 col = flame * FLAMETONE; // tonemapping col = col / (1.0+col); // ~sqrt //col = pow(col, vec3(1.0/2.2)); col = sqrt(col); col = clamp(col, 0.0, 1.0); lowp vec4 p = texture2D(source, qt_TexCoord0); p.xyz = col; gl_FragColor = p * qt_Opacity; }