Fix visual bug on nvidia #859
@ -87,7 +87,7 @@ ShaderEffect {
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float alpha = 0.0;
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float frameShadow = max2(positiveLog(-coords * frameShadowCoeff + vec2(1.0)) + positiveLog(coords * frameShadowCoeff - (vec2(frameShadowCoeff) - vec2(1.0))));
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frameShadow = max(sqrt(frameShadow), 0.0);
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frameShadow = clamp(sqrt(frameShadow), 0.0, 1.0);
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color *= frameShadow;
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alpha = sum2(1.0 - step(vec2(0.0), coords) + step(vec2(1.0), coords));
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alpha = clamp(alpha, 0.0, 1.0);
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