use filtersize of 1.0 for distort and uv - compositor nodes.

Experimenting here and 0.765625f is too sharp, but 1.0 wont blur with 0 distorted pixels but gives nice interpolation otherwise.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/compositor/intern/COM_MemoryBuffer.cpp b/source/blender/compositor/intern/COM_MemoryBuffer.cpp
index ee1c0320f5f..0994f3f8890 100644
--- a/source/blender/compositor/intern/COM_MemoryBuffer.cpp
+++ b/source/blender/compositor/intern/COM_MemoryBuffer.cpp
@@ -283,7 +283,14 @@ void MemoryBuffer::readEWA(float result[4], float fx, float fy, float dx, float
 	// Use a different radius based on interpolation switch, just enough to anti-alias when interpolation is off,
 	// and slightly larger to make result a bit smoother than bilinear interpolation when interpolation is on
 	// (minimum values: const float rmin = intpol ? 1.f : 0.5f;)
+
+	/* note: 0.765625f is too sharp, 1.0 will not blur with an exact pixel sample
+	 * useful to avoid blurring when there is no distortion */
+#if 0
 	const float rmin = ((sampler != COM_PS_NEAREST) ? 1.5625f : 0.765625f) / ff2;
+#else
+	const float rmin = ((sampler != COM_PS_NEAREST) ? 1.5625f : 1.0f     ) / ff2;
+#endif
 	imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
 	if ((b2 = b * b) < rmin) {
 		if ((a2 = a * a) < rmin) {