diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index d00ebb0..7facbcc 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -2,7 +2,7 @@ name: Upload xyzcad Python Package
 
 on:
   release:
-    types: [published]
+    types: [created]
 
 permissions:
   contents: read
@@ -22,14 +22,9 @@ jobs:
       run: |
         python3 -m pip install poetry
         poetry install --only main
-    - name: Set Version
-      run: |
-        poetry version ${{ github.event.release.tag_name }}
     - name: Build package
       run: make build
     - name: Publish package
-      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
-      with:
-        user: __token__
-        password: ${{ secrets.PYPI_API_TOKEN }}
+      run:
+        poetry publish --username ${{ __token__ }} --password ${{ secrets.PYPI_API_TOKEN }}
 
diff --git a/Makefile b/Makefile
index 338fbf8..1c7cc81 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,7 @@ PROJ_SLUG = xyzcad
 SHELL = bash
 
 build:
+	poetry version $(shell git describe --tags --abbrev=0)
 	poetry build
 
 lint:
@@ -25,6 +26,7 @@ publish:
 	poetry publish
 
 clean:
+	poetry version 0.0.0+devel
 	rm -rf .pytest_cache \
 	rm -rf dist \
 	rm -rf build \
diff --git a/demo.py b/demo.py
index d364351..2ce0239 100644
--- a/demo.py
+++ b/demo.py
@@ -118,6 +118,6 @@ def cube(x, y, z):
 
 
 # render.renderAndSave(cube, 'demo.stl', 1)
-render.renderAndSave(f, "demo.stl", 0.5)
+render.renderAndSave(f, "demo.stl", 0.05)
 
 print(time.time() - t0)
diff --git a/pyproject.toml b/pyproject.toml
index 3ee4a66..3aa5f92 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "xyzcad"
-version = "0.4.6"
+version = "0.0.0+devel"
 description = "An implicit surface based functional CAD system"
 authors = ["Stefan Helmert <stefan.helmert@t-online.de>"]
 license = "AGPLv3"
diff --git a/xyzcad/render.py b/xyzcad/render.py
index c73d6a9..18f376e 100644
--- a/xyzcad/render.py
+++ b/xyzcad/render.py
@@ -16,6 +16,7 @@
 from numba import njit, objmode, prange, types
 from numba.typed import Dict, List
 from stl import mesh
+import importlib.metadata
 
 tlt = [[[0]]] * 256
 tlt[1] = [[0, 1, 2]]
@@ -553,7 +554,7 @@ def convert_corners2pts(cubeCornerValsDict, r):
         ptsResDict[(xh, yh, z)] = 0 < (v & 64)  # v110
         ptsResDict[(xh, yh, zh)] = 0 < (v & 128)  # v111
 
-    cubesList = list(cubeCornerValsDict.keys())
+    cubesList = list(set(cubeCornerValsDict.keys()))
 
     print(f"len(cubesList)={len(cubesList)}")
     cubesArray = np.asarray(cubesList)
@@ -829,6 +830,12 @@ def all_njit_func(func, res, tlt):
 
 def renderAndSave(func, filename, res=1):
     t0 = time.time()
+    #version = importlib.metadata.version('xyzcad')
+    print(__package__)
+    print(__name__)
+    version = importlib.metadata.version(__package__ or __name__)
+    print(f"running xyzcad version {version}")
+
     tlt_L = [List(e) for e in tlt]
     verticesArray = all_njit_func(func, res, tlt_L)
     print("all_njit_func time: {}".format(time.time() - t0))