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float4 GaussianBlur(sampler2D tex, float2 uv, float2 resolution, float radius)
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{
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    float4 color = float4(0, 0, 0, 0);
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    float totalWeight = 0.0;
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    int samples = 5; // Number of samples for blur
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    for (int x = -samples; x <= samples; x++)
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    {
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        for (int y = -samples; y <= samples; y++)
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        {
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            float2 offset = float2(x, y) * radius / resolution;
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            float weight = exp(-dot(offset, offset) / (2.0 * radius * radius));
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            color += tex2D(tex, uv + offset) * weight;
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            totalWeight += weight;
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        }
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    }
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    return color / totalWeight;
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}