Force to no color space conversion at texture uploading

src/renderers/webgl/WebGLTextures.js

@@ -504,6 +504,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 		_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
 		_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
 		_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
+		_gl.pixelStorei( _gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, _gl.NONE );
 
 		const needsPowerOfTwo = textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( texture.image ) === false;
 		const image = resizeImage( texture.image, needsPowerOfTwo, false, maxTextureSize );
@@ -713,6 +714,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 		_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
 		_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
 		_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
+		_gl.pixelStorei( _gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, _gl.NONE );
 
 		const isCompressed = ( texture && ( texture.isCompressedTexture || texture.image[ 0 ].isCompressedTexture ) );
 		const isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );

utils/build/rollup.config.js

@@ -6,7 +6,7 @@ import babelrc from '../../.babelrc.json';
 function glconstants() {
 
 	var constants = {
-		POINTS: 0, ZERO: 0,
+		POINTS: 0, ZERO: 0, NONE: 0,
 		LINES: 1, ONE: 1,
 		LINE_LOOP: 2,
 		LINE_STRIP: 3,
@@ -145,6 +145,7 @@ function glconstants() {
 		MAX_FRAGMENT_UNIFORM_VECTORS: 36349,
 		UNPACK_FLIP_Y_WEBGL: 37440,
 		UNPACK_PREMULTIPLY_ALPHA_WEBGL: 37441,
+		UNPACK_COLORSPACE_CONVERSION_WEBGL: 37443,
 		UNPACK_ROW_LENGTH: 3314,
 		UNPACK_IMAGE_HEIGHT: 32878,
 		UNPACK_SKIP_PIXELS: 3316,