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Raymarched torus and core lit in crimson. Drag your cursor to orbit it.

• GLSL
• raymarch
• 3D
• interactive

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An animated Julia set blooming through a cosine palette.

• GLSL
• fractal

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Domain-warped fbm noise forming a slow crimson nebula.

• GLSL
• fbm
• noise

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Animated Voronoi cells with bright glowing cores.

• GLSL
• voronoi

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A six-fold mirrored interference pattern.

• GLSL
• kaleidoscope

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An endless polar tunnel rushing inward.

• GLSL
• tunnel

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A breathing zoom into the Mandelbrot set.

• GLSL
• fractal

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Layered sine distortion that fakes pool caustics.

• GLSL
• caustics

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Six charges merging into smooth crimson blobs.

• GLSL
• metaballs

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A turning two-arm spiral with a bright core and stars.

• GLSL
• procedural

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The interactive FBM ink flow from the home page - warped crimson-and-ink turbulence that pushes away from your cursor.

• GLSL
• FBM
• interactive

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Scrolling Truchet tiling - random quarter-arcs stitched across a grid, with a crimson pulse riding each tile.

• GLSL
• tiling
• 2D

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A single signed-distance sphere marched per pixel, wobbling and orbiting, lit with a crimson diffuse + rim.

• GLSL
• raymarch
• SDF
• 3D

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The classic sum-of-sines plasma in the site's ink-and-crimson palette - cheap, hypnotic, and a good first shader.

• GLSL
• plasma
• 2D

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Constant blue, the simplest possible pixel shader.

• GLSL
• basics
• color

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A constant yellow fill.

• GLSL
• basics
• color

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A constant color that also sets alpha.

• GLSL
• basics
• color

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Constant pink stored in a color variable.

• GLSL
• basics
• color

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Constant soft red fill.

• GLSL
• basics
• color

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Builds a color by adding separate channel vectors.

• GLSL
• basics
• channels

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Doubles a uv based color to brighten it.

• GLSL
• basics
• color

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Zeroes the blue channel of a uv color.

• GLSL
• basics
• channels

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Swaps channels with a bgra swizzle.

• GLSL
• basics
• swizzle

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step on raw pixel x splits red and black.

• GLSL
• basics
• step

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Normalized x with step makes a clean half split.

• GLSL
• basics
• step

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Pixel position drawn as a red green gradient.

• GLSL
• basics
• uv

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step on x lights the right half red.

• GLSL
• basics
• step

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step on x lights the left half red.

• GLSL
• basics
• step

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Two step edges carve three vertical bands.

• GLSL
• basics
• step

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A colored frame with a black center.

• GLSL
• basics
• step

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fract makes repeating vertical stripes.

• GLSL
• basics
• fract

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fract tiles a rounded square pattern.

• GLSL
• basics
• fract

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fract on pixels draws a line grid.

• GLSL
• basics
• fract

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mod builds a wider repeating stripe.

• GLSL
• basics
• mod

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mix blends two colors across x.

• GLSL
• basics
• mix

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mix on both axes interpolates four corners.

• GLSL
• basics
• mix

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smoothstep eases a green to red blend.

• GLSL
• basics
• smoothstep

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abs makes a symmetric vee around the center.

• GLSL
• basics
• abs

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abs of centered uv draws a rhombus.

• GLSL
• basics
• abs

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ceil quantizes uv into stepped bands.

• GLSL
• basics
• ceil

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floor picks a palette band per slice of x.

• GLSL
• basics
• floor

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distance draws a filled disc.

• GLSL
• basics
• length

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Aspect corrected distance keeps the circle round.

• GLSL
• basics
• length

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atan colors pixels by angle around the center.

• GLSL
• basics
• atan

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sin of the radius makes concentric rings.

• GLSL
• basics
• sin

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normalize shows direction as brightness.

• GLSL
• basics
• normalize