diff --git a/js/io/formats/optifine_jem.js b/js/io/formats/optifine_jem.js
index fd3c66fe..c90b11bc 100644
--- a/js/io/formats/optifine_jem.js
+++ b/js/io/formats/optifine_jem.js
@@ -383,11 +383,12 @@ BARS.defineActions(function() {
 	})
 })
 
-new ValidatorCheck('optifine_jem_uv', {
-	condition: {formats: ['optifine_entity']},
+new ValidatorCheck('zero_wide_uv_faces', {
+	condition: {formats: ['optifine_entity', 'java_block']},
 	update_triggers: ['update_selection'],
 	run() {
 		for (let cube of Cube.all) {
+			if (cube.box_uv && Format.id == 'optifine_entity') continue;
 			let select_cube_button = {
 				name: 'Select Cube',
 				icon: 'fa-cube',
@@ -399,25 +400,16 @@ new ValidatorCheck('optifine_jem_uv', {
 			for (let fkey in cube.faces) {
 				let face = cube.faces[fkey];
 				let uv_size = face.uv_size;
-				let size_issue, offset_issue;
+				let size_issue;
 				for (let i of [0, 1]) {
 					let size = uv_size[i];
-					if (Math.roundTo(size, 4) && Math.abs(size) < 1) {
+					if (Math.abs(size) < 0.00005) {
 						size_issue = true;
 					}
-					if (Math.roundTo(face.uv[i], 4) % 1) {
-						offset_issue = true;
-					}
 				}
 				if (size_issue) {
 					this.warn({
-						message: `The face "${fkey}" on cube "${cube.name}" has invalid UV sizes. UV sizes with an absolute value below 1 but not 0 are invalid in OptiFine models.`,
-						buttons: [select_cube_button]
-					})
-				}
-				if (offset_issue) {
-					this.warn({
-						message: `The face "${fkey}" on cube "${cube.name}" has an invalid UV offset. OptiFine only supports integer values as UV offset.`,
+						message: `The face "${fkey}" on cube "${cube.name}" has invalid UV sizes. UV sizes cannot be 0.`,
 						buttons: [select_cube_button]
 					})
 				}