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Reduce alpha clamp for blur to prevent image retention, update RT64

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Mr-Wiseguy
2024-03-28 20:53:17 -04:00
parent fe284112bc
commit 1caf81e1cf
2 changed files with 5 additions and 5 deletions
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lib/rt64
+1 -1
Submodule lib/rt64 updated: 788070540d...7e2479d6b6
patches/effect_patches.c
+4 -4
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@@ -97,10 +97,10 @@ void Play_DrawMotionBlur(PlayState* this) {
s32 original_alpha = alpha;
f32 exponent = 20.0f / recomp_get_target_framerate(gFramerateDivisor);
f32 alpha_float = recomp_powf(alpha / 255.0f, exponent);
// Clamp to an alpha of 0.9, which ensures that the output color converges to within a reasonable delta
// of the target color when using an R8G8B8A8 framebuffer as RT64 currently does.
// Not clamping leads to image retention at high framerates.
alpha_float = MIN(alpha_float, 0.9f);
// Clamp the blur alpha, which ensures that the output color converges to within a reasonable delta of the target color
// when using an R8G8B8A8 framebuffer as RT64 currently does. Although this makes the effect less noticeable at high framerates,
// not clamping leads to noticeable image retention.
alpha_float = MIN(alpha_float, 0.825f);
alpha = (s32)(alpha_float * 255.0f);
if (sMotionBlurStatus == MOTION_BLUR_PROCESS) {