diff --git a/src/canvas.cpp b/src/canvas.cpp
index 59012c8..acbf698 100644
--- a/src/canvas.cpp
+++ b/src/canvas.cpp
@@ -1259,7 +1259,9 @@ void Canvas::stroke_start(glm::vec3 point, float pressure)
             m_tmp_dual[i].unbindFramebuffer();
         }
     }
+    m_mixer.bindFramebuffer();
     m_mixer.clear();
+    m_mixer.unbindFramebuffer();
     m_show_tmp = true;
 }
 void Canvas::layer_add(std::string name, std::shared_ptr<Layer> layer /*= nullptr*/, int index /*= 0*/)
diff --git a/src/node_stroke_preview.cpp b/src/node_stroke_preview.cpp
index b80db00..21d2993 100644
--- a/src/node_stroke_preview.cpp
+++ b/src/node_stroke_preview.cpp
@@ -129,7 +129,7 @@ void NodeStrokePreview::stroke_draw_mix(const glm::vec2& bb_min, const glm::vec2
     glActiveTexture(GL_TEXTURE0);
     m_tex_background.bind();
     glActiveTexture(GL_TEXTURE1);
-    m_tex.bind();
+    m_rtt.bindTexture();
     glActiveTexture(GL_TEXTURE3);
     m_tex_dual.bind();
     glActiveTexture(GL_TEXTURE4);
@@ -144,7 +144,7 @@ void NodeStrokePreview::stroke_draw_mix(const glm::vec2& bb_min, const glm::vec2
 
 glm::vec4 NodeStrokePreview::stroke_draw_samples(std::array<vertex_t, 4>& P, Texture2D& blend_tex)
 {
-    //if (!ShaderManager::ext_framebuffer_fetch)
+    if (!ShaderManager::ext_framebuffer_fetch)
     {
         glActiveTexture(GL_TEXTURE1);
         blend_tex.bind(); // bg, copy of framebuffer (copied before drawing)
@@ -164,7 +164,7 @@ glm::vec4 NodeStrokePreview::stroke_draw_samples(std::array<vertex_t, 4>& P, Tex
     glm::vec2 pad(1);
     glm::ivec2 tex_pos = glm::clamp(glm::floor(bb_min) - pad, { 0, 0 }, size);
     glm::ivec2 tex_sz = glm::clamp(glm::ceil(bb_sz) + pad * 2.f, { 0, 0 }, (glm::vec2)(glm::ivec2(size) - tex_pos));
-    //if (!ShaderManager::ext_framebuffer_fetch)
+    if (!ShaderManager::ext_framebuffer_fetch)
     {
         // this is also used by the mixer
         glCopyTexSubImage2D(GL_TEXTURE_2D, 0, tex_pos.x, tex_pos.y,
@@ -184,7 +184,7 @@ glm::vec4 NodeStrokePreview::stroke_draw_samples(std::array<vertex_t, 4>& P, Tex
     }
     m_brush_shape.draw_fill();
 
-    //if (!ShaderManager::ext_framebuffer_fetch)
+    if (!ShaderManager::ext_framebuffer_fetch)
     {
         glActiveTexture(GL_TEXTURE1);
         blend_tex.unbind();
@@ -414,8 +414,11 @@ void NodeStrokePreview::draw_stroke_immediate()
 
     glActiveTexture(GL_TEXTURE0);
     b->m_tip_texture->bind();
-    glActiveTexture(GL_TEXTURE1);
-    m_tex.bind(); // tmp swap for blending
+    if (!ShaderManager::ext_framebuffer_fetch)
+    {
+        glActiveTexture(GL_TEXTURE1);
+        m_tex.bind(); // tmp swap for blending
+    }
     glActiveTexture(GL_TEXTURE2);
     b->m_pattern_texture ?
         b->m_pattern_texture->bind() :