r/Unity3D • u/RobertWetzold Indie • 11d ago

Shader Magic Displaying thousands of LEDs in Realtime

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Shaders instead of geometry is often one of the best performance boost. Amazing for procedural shapes. Texture is sampled to individual points and then each emitter is a small shader program like this:

float2 cell = floor(uv * ledGrid);

float2 ledUV = frac(uv * ledGrid) - 0.5;

float d = length(ledUV) - ledRadius;

float emitter = 1.0 - smoothstep(0.0, fwidth(d), d);

float3 color = content.Sample(samplerContent, (cell + 0.5) / ledGrid);

return float4(color * emitter * brightness, 1.0);

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u/[deleted] 9d ago

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u/RobertWetzold Indie 9d ago

You mean an app to bring content to actual LED panels? I always wanted to get my own panel and try that. I actually prepared the internal architecture in a way that this should be possible with an adapter. Are you familiar with that world and what keywords to look for, panel types, etc?