Align OSL implementation of cellnoise3d with GLSL (#2906)

bhouston · web-flow · commit 0be209e2b176 · 2026-05-12T15:33:52.000-07:00
Prior to this fix cellnoise3d looked different for OSL as compared to Metal/GLSL.  After this fix they match.
diff --git a/libraries/stdlib/genosl/mx_cellnoise3d_float.osl b/libraries/stdlib/genosl/mx_cellnoise3d_float.osl
@@ -1,4 +1,6 @@
 void mx_cellnoise3d_float(vector position, output float result)
 {
-    result = cellnoise(position);
+    // Use the explicit point overload for deterministic 3D cell lookup.
+    // Avoid relying on implicit vector conversion in the OSL builtin.
+    result = cellnoise(point(position));
 }

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,6 @@`
`1`	`1`	`void mx_cellnoise3d_float(vector position, output float result)`
`2`	`2`	`{`
`3`		`- result = cellnoise(position);`
	`3`	`+ // Use the explicit point overload for deterministic 3D cell lookup.`
	`4`	`+ // Avoid relying on implicit vector conversion in the OSL builtin.`
	`5`	`+ result = cellnoise(point(position));`
`4`	`6`	`}`