diff --git a/deps/NanoSVG/NanoSVG.cmake b/deps/NanoSVG/NanoSVG.cmake
index 9623d3226..1b0fb9960 100644
--- a/deps/NanoSVG/NanoSVG.cmake
+++ b/deps/NanoSVG/NanoSVG.cmake
@@ -1,4 +1,9 @@
+# In PrusaSlicer 2.6.0 we switched from https://github.com/memononen/nanosvg to its fork https://github.com/fltk/nanosvg
+# because this last implements the new function nsvgRasterizeXY() which we now use in GLTexture::load_from_svg()
+# for rasterizing svg files from their original size to a squared power of two texture on Windows systems using
+# AMD Radeon graphics cards
+
 prusaslicer_add_cmake_project(NanoSVG
-    URL https://github.com/memononen/nanosvg/archive/4c8f0139b62c6e7faa3b67ce1fbe6e63590ed148.zip
-    URL_HASH SHA256=584e084af1a75bf633f79753ce2f6f6ec8686002ca27f35f1037c25675fecfb6
+    URL https://github.com/fltk/nanosvg/archive/abcd277ea45e9098bed752cf9c6875b533c0892f.zip
+    URL_HASH SHA256=e859938fbaee4b351bd8a8b3d3c7a75b40c36885ce00b73faa1ce0b98aa0ad34
 )
\ No newline at end of file
diff --git a/src/slic3r/GUI/GLTexture.cpp b/src/slic3r/GUI/GLTexture.cpp
index ef9a8ef20..93e96a642 100644
--- a/src/slic3r/GUI/GLTexture.cpp
+++ b/src/slic3r/GUI/GLTexture.cpp
@@ -375,10 +375,29 @@ void GLTexture::render_sub_texture(unsigned int tex_id, float left, float right,
     glsafe(::glDisable(GL_BLEND));
 }
 
+static bool to_squared_power_of_two(const std::string& filename, int max_size_px, int& w, int& h)
+{
+    auto is_power_of_two = [](int v) { return v != 0 && (v & (v - 1)) == 0; };
+    auto upper_power_of_two = [](int v) { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; };
+
+    int new_w = std::max(w, h);
+    if (!is_power_of_two(new_w))
+        new_w = upper_power_of_two(new_w);
+
+    while (new_w > max_size_px) {
+        new_w /= 2;
+    }
+
+    const int new_h = new_w;
+    const bool ret = (new_w != w || new_h != h);
+    w = new_w;
+    h = new_h;
+    return ret;
+}
+
 bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECompressionType compression_type, bool apply_anisotropy)
 {
     const bool compression_enabled = (compression_type != None) && OpenGLManager::are_compressed_textures_supported();
-    const bool use_compressor = compression_enabled && OpenGLManager::use_manually_generated_mipmaps();
 
     // Load a PNG with an alpha channel.
     wxImage image;
@@ -392,6 +411,11 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
 
     bool requires_rescale = false;
 
+    if (use_mipmaps && compression_enabled && OpenGLManager::force_power_of_two_textures()) {
+        if (to_squared_power_of_two(boost::filesystem::path(filename).filename().string(), OpenGLManager::get_gl_info().get_max_tex_size(), m_width, m_height))
+            requires_rescale = true;
+    }
+
     if (compression_enabled && compression_type == MultiThreaded) {
         // the stb_dxt compression library seems to like only texture sizes which are a multiple of 4
         int width_rem = m_width % 4;
@@ -448,7 +472,7 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
     }
 
     if (compression_enabled) {
-        if (compression_type == SingleThreaded || !use_compressor)
+        if (compression_type == SingleThreaded)
             glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data()));
         else {
             // initializes the texture on GPU 
@@ -460,7 +484,7 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
     else
         glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data()));
 
-    if (use_mipmaps && OpenGLManager::use_manually_generated_mipmaps()) {
+    if (use_mipmaps) {
         // we manually generate mipmaps because glGenerateMipmap() function is not reliable on all graphics cards
         int lod_w = m_width;
         int lod_h = m_height;
@@ -507,10 +531,6 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
             glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR));
         }
     }
-    else if (use_mipmaps && !OpenGLManager::use_manually_generated_mipmaps()) {
-        glsafe(::glGenerateMipmap(GL_TEXTURE_2D));
-        glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR));
-    }
     else {
         glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
         glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
@@ -522,7 +542,7 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
 
     m_source = filename;
 
-    if (use_compressor && compression_type == MultiThreaded)
+    if (compression_type == MultiThreaded)
         // start asynchronous compression
         m_compressor.start_compressing();
 
@@ -532,7 +552,6 @@ bool GLTexture::load_from_png(const std::string& filename, bool use_mipmaps, ECo
 bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, bool compress, bool apply_anisotropy, unsigned int max_size_px)
 {
     const bool compression_enabled = compress && OpenGLManager::are_compressed_textures_supported();
-    const bool use_compressor = compression_enabled && OpenGLManager::use_manually_generated_mipmaps();
 
     NSVGimage* image = BitmapCache::nsvgParseFromFileWithReplace(filename.c_str(), "px", 96.0f, {});
     if (image == nullptr) {
@@ -540,11 +559,17 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
         return false;
     }
 
-    float scale = (float)max_size_px / std::max(image->width, image->height);
+    const float scale = (float)max_size_px / std::max(image->width, image->height);
 
     m_width = (int)(scale * image->width);
     m_height = (int)(scale * image->height);
 
+    if (use_mipmaps && compression_enabled && OpenGLManager::force_power_of_two_textures())
+        to_squared_power_of_two(boost::filesystem::path(filename).filename().string(), max_size_px, m_width, m_height);
+
+    float scale_w = (float)m_width / image->width;
+    float scale_h = (float)m_height / image->height;
+
     if (compression_enabled) {
         // the stb_dxt compression library seems to like only texture sizes which are a multiple of 4
         int width_rem = m_width % 4;
@@ -574,7 +599,7 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
 
     // creates the temporary buffer only once, with max size, and reuse it for all the levels, if generating mipmaps
     std::vector<unsigned char> data(n_pixels * 4, 0);
-    nsvgRasterize(rast, image, 0, 0, scale, data.data(), m_width, m_height, m_width * 4);
+    nsvgRasterizeXY(rast, image, 0, 0, scale_w, scale_h, data.data(), m_width, m_height, m_width * 4);
 
     // sends data to gpu
     glsafe(::glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
@@ -588,19 +613,15 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
     }
 
     if (compression_enabled) {
-        if (use_compressor) {
-            // initializes the texture on GPU 
-            glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
-            // and send the uncompressed data to the compressor
-            m_compressor.add_level((unsigned int)m_width, (unsigned int)m_height, data);
-        }
-        else
-            glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data()));
+        // initializes the texture on GPU 
+        glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
+        // and send the uncompressed data to the compressor
+        m_compressor.add_level((unsigned int)m_width, (unsigned int)m_height, data);
     }
     else
         glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data()));
 
-    if (use_mipmaps && OpenGLManager::use_manually_generated_mipmaps()) {
+    if (use_mipmaps) {
         // we manually generate mipmaps because glGenerateMipmap() function is not reliable on all graphics cards
         int lod_w = m_width;
         int lod_h = m_height;
@@ -610,11 +631,12 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
 
             lod_w = std::max(lod_w / 2, 1);
             lod_h = std::max(lod_h / 2, 1);
-            scale /= 2.0f;
+            scale_w /= 2.0f;
+            scale_h /= 2.0f;
 
             data.resize(lod_w * lod_h * 4);
 
-            nsvgRasterize(rast, image, 0, 0, scale, data.data(), lod_w, lod_h, lod_w * 4);
+            nsvgRasterizeXY(rast, image, 0, 0, scale_w, scale_h, data.data(), lod_w, lod_h, lod_w * 4);
             if (compression_enabled) {
                 // initializes the texture on GPU 
                 glsafe(::glTexImage2D(GL_TEXTURE_2D, level, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, (GLsizei)lod_w, (GLsizei)lod_h, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
@@ -630,10 +652,6 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
             glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR));
         }
     }
-    else if (use_mipmaps && !OpenGLManager::use_manually_generated_mipmaps()) {
-        glsafe(::glGenerateMipmap(GL_TEXTURE_2D));
-        glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR));
-    }
     else {
         glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
         glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0));
@@ -645,7 +663,7 @@ bool GLTexture::load_from_svg(const std::string& filename, bool use_mipmaps, boo
 
     m_source = filename;
 
-    if (use_compressor)
+    if (compression_enabled)
         // start asynchronous compression
         m_compressor.start_compressing();
 
diff --git a/src/slic3r/GUI/OpenGLManager.cpp b/src/slic3r/GUI/OpenGLManager.cpp
index 8959553e6..ecf0c5790 100644
--- a/src/slic3r/GUI/OpenGLManager.cpp
+++ b/src/slic3r/GUI/OpenGLManager.cpp
@@ -200,7 +200,6 @@ std::string OpenGLManager::GLInfo::to_string(bool for_github) const
     out << b_start << "Renderer:     " << b_end << m_renderer << line_end;
     out << b_start << "GLSL version: " << b_end << m_glsl_version << line_end;
     out << b_start << "Textures compression:       " << b_end << (are_compressed_textures_supported() ? "Enabled" : "Disabled") << line_end;
-    out << b_start << "Textures mipmap generation: " << b_end << (use_manually_generated_mipmaps() ? "Manual" : "Automatic") << line_end;
 
     {
 #if ENABLE_GL_CORE_PROFILE
@@ -257,7 +256,7 @@ std::vector<std::string> OpenGLManager::GLInfo::get_extensions_list() const
 
 OpenGLManager::GLInfo OpenGLManager::s_gl_info;
 bool OpenGLManager::s_compressed_textures_supported = false;
-bool OpenGLManager::s_use_manually_generated_mipmaps = true;
+bool OpenGLManager::s_force_power_of_two_textures = false;
 OpenGLManager::EMultisampleState OpenGLManager::s_multisample = OpenGLManager::EMultisampleState::Unknown;
 OpenGLManager::EFramebufferType OpenGLManager::s_framebuffers_type = OpenGLManager::EFramebufferType::Unknown;
 
@@ -415,17 +414,16 @@ bool OpenGLManager::init_gl()
         // texture of the bed (see: https://github.com/prusa3d/PrusaSlicer/issues/8417).
         // It seems that this issue only triggers when mipmaps are generated manually
         // (combined with a texture compression) with texture size not being power of two.
-        // When mipmaps are generated through OpenGL function glGenerateMipmap() the driver works fine.
+        // When mipmaps are generated through OpenGL function glGenerateMipmap() the driver works fine,
+        // but the mipmap generation is quite slow on some machines.
         // There is no an easy way to detect the driver version without using Win32 API because the strings returned by OpenGL
         // have no standardized format, only some of them contain the driver version.
-        // Until we do not know that driver will be fixed (if ever) we force the use of glGenerateMipmap() on all cards
+        // Until we do not know that driver will be fixed (if ever) we force the use of power of two textures on all cards
         // containing the string 'Radeon' in the string returned by glGetString(GL_RENDERER)
         const auto& gl_info = OpenGLManager::get_gl_info();
-        if (boost::contains(gl_info.get_vendor(), "ATI Technologies Inc.") && boost::contains(gl_info.get_renderer(), "Radeon")) {
-            s_use_manually_generated_mipmaps = false;
-            BOOST_LOG_TRIVIAL(debug) << "Mipmapping through OpenGL was enabled.";
-        }
-#endif
+        if (boost::contains(gl_info.get_vendor(), "ATI Technologies Inc.") && boost::contains(gl_info.get_renderer(), "Radeon"))
+            s_force_power_of_two_textures = true;
+#endif // _WIN32
     }
 
     return true;
diff --git a/src/slic3r/GUI/OpenGLManager.hpp b/src/slic3r/GUI/OpenGLManager.hpp
index 6b947deb5..5e2bdc316 100644
--- a/src/slic3r/GUI/OpenGLManager.hpp
+++ b/src/slic3r/GUI/OpenGLManager.hpp
@@ -110,7 +110,7 @@ private:
     static OSInfo s_os_info;
 #endif //__APPLE__
     static bool s_compressed_textures_supported;
-    static bool s_use_manually_generated_mipmaps;
+    static bool s_force_power_of_two_textures;
 
     static EMultisampleState s_multisample;
     static EFramebufferType s_framebuffers_type;
@@ -139,7 +139,7 @@ public:
     static EFramebufferType get_framebuffers_type() { return s_framebuffers_type; }
     static wxGLCanvas* create_wxglcanvas(wxWindow& parent);
     static const GLInfo& get_gl_info() { return s_gl_info; }
-    static bool use_manually_generated_mipmaps() { return s_use_manually_generated_mipmaps; }
+    static bool force_power_of_two_textures() { return s_force_power_of_two_textures; }
 
 private:
 #if ENABLE_GL_CORE_PROFILE || ENABLE_OPENGL_ES