depricate sPC(float, float)

the function is already removed in upstream.
You can use wu_pixel() instead, which is much faster and more accurate.

wled00/FX.cpp

@@ -5539,7 +5539,10 @@ uint16_t mode_2DLissajous(void) {            // By: Andrew Tuline
         float ylocn = float(cos8(phase/2 + i*2)) / 255.0f;
         //SEGMENT.setPixelColorXY(xlocn, ylocn, SEGMENT.color_from_palette(strip.now/100+i, false, PALETTE_SOLID_WRAP, 0)); // draw pixel with anti-aliasing
         unsigned palIndex = (256*ylocn) + phase/2 + (i* SEGMENT.speed)/64;
-        SEGMENT.setPixelColorXY(xlocn, ylocn, SEGMENT.color_from_palette(palIndex, false, PALETTE_SOLID_WRAP, 0)); // draw pixel with anti-aliasing - color follows rotation
+        //SEGMENT.setPixelColorXY(xlocn, ylocn, SEGMENT.color_from_palette(palIndex, false, PALETTE_SOLID_WRAP, 0)); // draw pixel with anti-aliasing - color follows rotation
+        // WLEDMM wu_pixel is 50% faster, and still lokks better
+        SEGMENT.wu_pixel(uint32_t(xlocn * (cols <<8)), uint32_t(ylocn * (rows <<8)), 
+                         CRGB(SEGMENT.color_from_palette(palIndex, false, PALETTE_SOLID_WRAP, 0)));
       }
   } else
   for (int i=0; i < 256; i ++) {

wled00/FX_2Dfcn.cpp

@@ -413,6 +413,8 @@ void IRAM_ATTR_YN Segment::setPixelColorXY(int x, int y, uint32_t col) //WLEDMM:
   }
 }
 
+#if 0
+// WLEDMM setPixelColorXY(float x, float y, uint32_t col, ..) is depricated. use wu_pixel(x,y,col) instead.
 // anti-aliased version of setPixelColorXY()
 void Segment::setPixelColorXY(float x, float y, uint32_t col, bool aa, bool fast) // WLEDMM some speedups due to fast int and faster sqrt16
 {
@@ -463,6 +465,7 @@ void Segment::setPixelColorXY(float x, float y, uint32_t col, bool aa, bool fast
     setPixelColorXY(uint16_t(roundf(fX)), uint16_t(roundf(fY)), col);
   }
 }
+#endif
 
 // returns RGBW values of pixel
 uint32_t IRAM_ATTR_YN Segment::getPixelColorXY(int x, int y) const {