diff --git a/Backends/HTML5-Worker/kha/Image.hx b/Backends/HTML5-Worker/kha/Image.hx
index bc055620b..257fb7214 100644
--- a/Backends/HTML5-Worker/kha/Image.hx
+++ b/Backends/HTML5-Worker/kha/Image.hx
@@ -109,6 +109,8 @@ class Image implements Canvas implements Resource {
 					bytes = Bytes.alloc(2 * width * height);
 				case RGBA64:
 					bytes = Bytes.alloc(8 * width * height);
+				case RGBA64U:
+					bytes = Bytes.alloc(8 * width * height);
 				case A32:
 					bytes = Bytes.alloc(4 * width * height);
 				case A16:
@@ -177,6 +179,7 @@ class Image implements Canvas implements Resource {
 			case RGBA128: 16;
 			case DEPTH16: 2;
 			case RGBA64: 8;
+			case RGBA64U: 8;
 			case A32: 4;
 			case A16: 2;
 			default: 4;
diff --git a/Backends/HTML5/kha/SystemImpl.hx b/Backends/HTML5/kha/SystemImpl.hx
index f9960ea42..316925d83 100644
--- a/Backends/HTML5/kha/SystemImpl.hx
+++ b/Backends/HTML5/kha/SystemImpl.hx
@@ -393,7 +393,6 @@ class SystemImpl {
 					antialias: options.framebuffer.samplesPerPixel > 1,
 					stencil: true
 				}); // preserveDrawingBuffer: true } ); Warning: preserveDrawingBuffer can cause huge performance issues on mobile browsers
-			SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
 
 			halfFloat = {HALF_FLOAT_OES: 0x140B}; // GL_HALF_FLOAT
 			depthTexture = {UNSIGNED_INT_24_8_WEBGL: 0x84FA}; // GL_UNSIGNED_INT_24_8
@@ -422,7 +421,6 @@ class SystemImpl {
 						antialias: options.framebuffer.samplesPerPixel > 1,
 						stencil: true
 					}); // preserveDrawingBuffer: true } ); WARNING: preserveDrawingBuffer causes huge performance issues (on mobile browser)!
-				SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
 				SystemImpl.gl.getExtension("OES_texture_float");
 				SystemImpl.gl.getExtension("OES_texture_float_linear");
 				halfFloat = SystemImpl.gl.getExtension("OES_texture_half_float");
diff --git a/Backends/HTML5/kha/WebGLImage.hx b/Backends/HTML5/kha/WebGLImage.hx
index 9164a3ccc..3585d8f57 100644
--- a/Backends/HTML5/kha/WebGLImage.hx
+++ b/Backends/HTML5/kha/WebGLImage.hx
@@ -51,6 +51,8 @@ class WebGLImage extends Image {
 	static inline var GL_R16F = 0x822D;
 	static inline var GL_R32F = 0x822E;
 	static inline var GL_RED = 0x1903;
+	static inline var GL_RGBA16UI = 0x8D76;
+	static inline var GL_RGBA_INTEGER = 0x8D99;
 	static inline var GL_DEPTH_COMPONENT24 = 0x81A6;
 	static inline var GL_DEPTH24_STENCIL8 = 0x88F0;
 	static inline var GL_DEPTH32F_STENCIL8 = 0x8CAD;
@@ -209,8 +211,11 @@ class WebGLImage extends Image {
 		SystemImpl.gl.bindTexture(GL.TEXTURE_2D, texture);
 		// Sys.gl.pixelStorei(Sys.gl.UNPACK_FLIP_Y_WEBGL, true);
 
-		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, GL.LINEAR);
-		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.LINEAR);
+		// Integer-format textures cannot use linear filtering in webgl2
+		final isIntegerFormat = myFormat == RGBA64U;
+		final filter = isIntegerFormat ? GL.NEAREST : GL.LINEAR;
+		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, filter);
+		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, filter);
 		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);
 		SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);
 		if (renderTarget) {
@@ -227,6 +232,8 @@ class WebGLImage extends Image {
 						SystemImpl.halfFloat.HALF_FLOAT_OES, null);
 				case RGBA32:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, realWidth, realHeight, 0, GL.RGBA, GL.UNSIGNED_BYTE, null);
+				case RGBA64U:
+					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL_RGBA16UI, realWidth, realHeight, 0, GL_RGBA_INTEGER, GL.UNSIGNED_SHORT, null);
 				case A32:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, SystemImpl.gl2 ? GL_R32F : GL.ALPHA, realWidth, realHeight, 0,
 						SystemImpl.gl2 ? GL_RED : GL.ALPHA, GL.FLOAT, null);
@@ -288,7 +295,10 @@ class WebGLImage extends Image {
 			SystemImpl.gl.bindFramebuffer(GL.FRAMEBUFFER, null);
 		}
 		else if (video != null) {
+			// premultiply alpha for dom videos
+			SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
 			SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, video);
+			SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0);
 		}
 		else {
 			switch (myFormat) {
@@ -302,8 +312,13 @@ class WebGLImage extends Image {
 						SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, myWidth, myHeight, 0, GL.RGBA, GL.UNSIGNED_BYTE, image);
 					}
 					else {
+						// premultiply alpha for dom images
+						SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
 						SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, image);
+						SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0);
 					}
+				case RGBA64U:
+					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL_RGBA16UI, myWidth, myHeight, 0, GL_RGBA_INTEGER, GL.UNSIGNED_SHORT, image);
 				case A32:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, SystemImpl.gl2 ? GL_R32F : GL.ALPHA, myWidth, myHeight, 0, SystemImpl.gl2 ? GL_RED : GL.ALPHA,
 						GL.FLOAT, image);
@@ -313,7 +328,10 @@ class WebGLImage extends Image {
 				case L8:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.LUMINANCE, myWidth, myHeight, 0, GL.LUMINANCE, GL.UNSIGNED_BYTE, image);
 				default:
+					// premultiply alpha for dom images
+					SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, image);
+					SystemImpl.gl.pixelStorei(GL.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0);
 			}
 		}
 		SystemImpl.gl.bindTexture(GL.TEXTURE_2D, null);
@@ -419,6 +437,7 @@ class WebGLImage extends Image {
 			case RGBA128: 16;
 			case DEPTH16: 2;
 			case RGBA64: 8;
+			case RGBA64U: 8;
 			case A32: 4;
 			case A16: 2;
 			default: 4;
@@ -429,6 +448,8 @@ class WebGLImage extends Image {
 		return switch (myFormat) {
 			case RGBA32, L8:
 				new Uint8Array(bytes.getData());
+			case RGBA64U:
+				new Uint16Array(bytes.getData());
 			case RGBA128, RGBA64, A32, A16:
 				new Float32Array(bytes.getData());
 			default:
@@ -453,8 +474,10 @@ class WebGLImage extends Image {
 			SystemImpl.gl.bindTexture(GL.TEXTURE_2D, texture);
 			// Sys.gl.pixelStorei(Sys.gl.UNPACK_FLIP_Y_WEBGL, true);
 
-			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, GL.LINEAR);
-			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.LINEAR);
+			final isIntegerFormat = myFormat == RGBA64U;
+			final filter = isIntegerFormat ? GL.NEAREST : GL.LINEAR;
+			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, filter);
+			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, filter);
 			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);
 			SystemImpl.gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);
 
@@ -475,8 +498,7 @@ class WebGLImage extends Image {
 						SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, width, height, 0, GL.RGBA, GL.UNSIGNED_BYTE, bytesToArray(rgbaBytes));
 					}
 				case RGBA128:
-					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, SystemImpl.gl2 ? GL_RGBA32F : GL.RGBA, width, height, 0, GL.RGBA, GL.FLOAT,
-						bytesToArray(bytes));
+					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, SystemImpl.gl2 ? GL_RGBA32F : GL.RGBA, width, height, 0, GL.RGBA, GL.FLOAT, bytesToArray(bytes));
 				case RGBA64:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, SystemImpl.gl2 ? GL_RGBA16F : GL.RGBA, width, height, 0, GL.RGBA,
 						SystemImpl.halfFloat.HALF_FLOAT_OES, bytesToArray(bytes));
@@ -488,6 +510,10 @@ class WebGLImage extends Image {
 						SystemImpl.halfFloat.HALF_FLOAT_OES, bytesToArray(bytes));
 				case RGBA32:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, width, height, 0, GL.RGBA, GL.UNSIGNED_BYTE, bytesToArray(bytes));
+				case RGBA64U:
+					SystemImpl.gl.pixelStorei(GL.UNPACK_ALIGNMENT, 2);
+					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL_RGBA16UI, width, height, 0, GL_RGBA_INTEGER, GL.UNSIGNED_SHORT, bytesToArray(bytes));
+					SystemImpl.gl.pixelStorei(GL.UNPACK_ALIGNMENT, 4);
 				default:
 					SystemImpl.gl.texImage2D(GL.TEXTURE_2D, 0, GL.RGBA, width, height, 0, GL.RGBA, GL.UNSIGNED_BYTE, bytesToArray(bytes));
 			}
@@ -509,7 +535,7 @@ class WebGLImage extends Image {
 			switch (myFormat) {
 				case RGBA128, A32:
 					pixels = new Float32Array(Std.int(formatByteSize(myFormat) / 4) * width * height);
-				case RGBA64, A16:
+				case RGBA64, A16, RGBA64U:
 					pixels = new Uint16Array(Std.int(formatByteSize(myFormat) / 2) * width * height);
 				case RGBA32, L8:
 					pixels = new Uint8Array(formatByteSize(myFormat) * width * height);
@@ -525,6 +551,8 @@ class WebGLImage extends Image {
 				SystemImpl.gl.readPixels(0, 0, myWidth, myHeight, GL.RGBA, SystemImpl.halfFloat.HALF_FLOAT_OES, pixels);
 			case RGBA32:
 				SystemImpl.gl.readPixels(0, 0, myWidth, myHeight, GL.RGBA, GL.UNSIGNED_BYTE, pixels);
+			case RGBA64U:
+				SystemImpl.gl.readPixels(0, 0, myWidth, myHeight, GL_RGBA_INTEGER, GL.UNSIGNED_SHORT, pixels);
 			case A32:
 				SystemImpl.gl.readPixels(0, 0, myWidth, myHeight, SystemImpl.gl2 ? GL_RED : GL.ALPHA, GL.FLOAT, pixels);
 			case A16:
@@ -575,6 +603,14 @@ class WebGLImage extends Image {
 					SystemImpl.halfFloat.HALF_FLOAT_OES, cast(mipmaps[i], WebGLImage).image);
 			}
 		}
+		else if (myFormat == TextureFormat.RGBA64U) {
+			SystemImpl.gl.pixelStorei(GL.UNPACK_ALIGNMENT, 2);
+			for (i in 0...mipmaps.length) {
+				SystemImpl.gl.texImage2D(GL.TEXTURE_2D, i + 1, GL_RGBA16UI, mipmaps[i].width, mipmaps[i].height, 0, GL_RGBA_INTEGER, GL.UNSIGNED_SHORT,
+					cast(mipmaps[i], WebGLImage).image);
+			}
+			SystemImpl.gl.pixelStorei(GL.UNPACK_ALIGNMENT, 4);
+		}
 		else {
 			for (i in 0...mipmaps.length) {
 				SystemImpl.gl.texImage2D(GL.TEXTURE_2D, i + 1, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, cast(mipmaps[i], WebGLImage).image);
diff --git a/Backends/Kore-HL/kha/Image.hx b/Backends/Kore-HL/kha/Image.hx
index 4168f8f6c..1fd3a6f99 100644
--- a/Backends/Kore-HL/kha/Image.hx
+++ b/Backends/Kore-HL/kha/Image.hx
@@ -103,6 +103,8 @@ class Image implements Canvas implements Resource {
 				return 5;
 			case A16: // Target16BitRedFloat
 				return 6;
+			case RGBA64U: // Target64BitInteger
+				return 7;
 			default:
 				return 0;
 		}
@@ -142,6 +144,8 @@ class Image implements Canvas implements Resource {
 				return 5;
 			case A16:
 				return 7;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey8
 		}
@@ -154,7 +158,7 @@ class Image implements Canvas implements Resource {
 		if (renderTarget)
 			image.initRenderTarget(width, height, getDepthBufferBits(depthStencil), getRenderTargetFormat(format), getStencilBufferBits(depthStencil));
 		else
-			image.init(width, height, format);
+			image.init(width, height, getTextureFormat(format));
 		return image;
 	}
 
@@ -334,6 +338,7 @@ class Image implements Canvas implements Resource {
 			case RGBA128: 16;
 			case DEPTH16: 2;
 			case RGBA64: 8;
+			case RGBA64U: 8;
 			case A32: 4;
 			case A16: 2;
 			default: 4;
diff --git a/Backends/Kore-HL/kha/graphics4/CubeMap.hx b/Backends/Kore-HL/kha/graphics4/CubeMap.hx
index e038d86e4..03bb7c3f1 100644
--- a/Backends/Kore-HL/kha/graphics4/CubeMap.hx
+++ b/Backends/Kore-HL/kha/graphics4/CubeMap.hx
@@ -38,6 +38,8 @@ class CubeMap implements Canvas implements Resource {
 				return 3;
 			case DEPTH16: // Target16BitDepth
 				return 4;
+			case RGBA64U: // Target64BitInteger
+				return 7;
 			default:
 				return 0;
 		}
@@ -75,6 +77,8 @@ class CubeMap implements Canvas implements Resource {
 				return 4;
 			case A32:
 				return 5;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey 8
 		}
diff --git a/Backends/Kore-hxcpp/kha/Image.hx b/Backends/Kore-hxcpp/kha/Image.hx
index 24eab5843..70717d787 100644
--- a/Backends/Kore-hxcpp/kha/Image.hx
+++ b/Backends/Kore-hxcpp/kha/Image.hx
@@ -195,6 +195,8 @@ class Image implements Canvas implements Resource {
 				return 5; // Target8BitRed
 			case A16:
 				return 6; // Target16BitRedFloat
+			case RGBA64U:
+				return 7; // Target64BitInteger
 			default:
 				return 0;
 		}
@@ -234,6 +236,8 @@ class Image implements Canvas implements Resource {
 				return 5;
 			case A16:
 				return 7;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey8
 		}
@@ -519,6 +523,7 @@ class Image implements Canvas implements Resource {
 			case RGBA128: 16;
 			case DEPTH16: 2;
 			case RGBA64: 8;
+			case RGBA64U: 8;
 			case A32: 4;
 			case A16: 2;
 			default: 4;
diff --git a/Backends/Kore-hxcpp/kha/graphics4/CubeMap.hx b/Backends/Kore-hxcpp/kha/graphics4/CubeMap.hx
index 46e8b5aa7..f678e5851 100644
--- a/Backends/Kore-hxcpp/kha/graphics4/CubeMap.hx
+++ b/Backends/Kore-hxcpp/kha/graphics4/CubeMap.hx
@@ -37,6 +37,8 @@ class CubeMap implements Canvas implements Resource {
 				return 3;
 			case DEPTH16: // Target16BitDepth
 				return 4;
+			case RGBA64U: // Target64BitInteger
+				return 7;
 			default:
 				return 0;
 		}
@@ -74,6 +76,8 @@ class CubeMap implements Canvas implements Resource {
 				return 4;
 			case A32:
 				return 5;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey 8
 		}
diff --git a/Backends/Krom/kha/Image.hx b/Backends/Krom/kha/Image.hx
index 1139799b2..b20af7727 100644
--- a/Backends/Krom/kha/Image.hx
+++ b/Backends/Krom/kha/Image.hx
@@ -36,6 +36,8 @@ class Image implements Canvas implements Resource {
 				return 5; // Target8BitRed
 			case A16:
 				return 6; // Target16BitRedFloat
+			case RGBA64U:
+				return 7; // Target64BitInteger
 			default:
 				return 0;
 		}
@@ -75,6 +77,8 @@ class Image implements Canvas implements Resource {
 				return 5;
 			case A16:
 				return 7;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey8
 		}
@@ -198,6 +202,7 @@ class Image implements Canvas implements Resource {
 			case RGBA128: 16;
 			case DEPTH16: 2;
 			case RGBA64: 8;
+			case RGBA64U: 8;
 			case A32: 4;
 			case A16: 2;
 			default: 4;
diff --git a/Backends/Krom/kha/graphics4/CubeMap.hx b/Backends/Krom/kha/graphics4/CubeMap.hx
index 5d0631308..fba47e035 100644
--- a/Backends/Krom/kha/graphics4/CubeMap.hx
+++ b/Backends/Krom/kha/graphics4/CubeMap.hx
@@ -24,6 +24,8 @@ class CubeMap implements Canvas implements Resource {
 				return 3;
 			case DEPTH16: // Target16BitDepth
 				return 4;
+			case RGBA64U: // Target64BitInteger
+				return 7;
 			default:
 				return 0;
 		}
@@ -61,6 +63,8 @@ class CubeMap implements Canvas implements Resource {
 				return 4;
 			case A32:
 				return 5;
+			case RGBA64U:
+				return 8;
 			default:
 				return 1; // Grey8
 		}
diff --git a/Sources/kha/graphics4/TextureFormat.hx b/Sources/kha/graphics4/TextureFormat.hx
index ce2db7479..97ab374f9 100644
--- a/Sources/kha/graphics4/TextureFormat.hx
+++ b/Sources/kha/graphics4/TextureFormat.hx
@@ -8,4 +8,5 @@ enum abstract TextureFormat(Int) to Int {
 	var RGBA64 = 4; // Half floats
 	var A32 = 5; // Float
 	var A16 = 6; // Half float
+	var RGBA64U = 7; // 16-bit uint
 }