I am not sure this is the best place the ask but here I go...
I am trying to render an image with the Pov ray addon for Blender 2.79b. When I do so, it just shows me an ugly checkerboard.
After some goofing around I clicked the info tab and it showed me this little message:
Traceback (most recent call last):
File "C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons\render_povray\render.py", line 4147, in render
self._export(scene, povPath, renderImagePath)
File "C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons\render_povray\render.py", line 3837, in _export
write_pov(self._temp_file_in, scene, info_callback)
File "C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons\render_povray\render.py", line 3648, in write_pov
shading.writeMaterial(using_uberpov, DEF_MAT_NAME, scene, tabWrite, safety, comments, uniqueName, materialNames, material)
File "C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons\render_povray\shading.py", line 251, in writeMaterial
if(t and t.use and validPath and
UnboundLocalError: local variable 'validPath' referenced before assignment
location: <unknown location>:-1
I don't really understand Python (or coding in general) unfortunately, so I don't want to touch anything until I understand it better.
Open the file C:\Program Files\Blender Foundation\Blender\2.79\scripts\addons\render_povray\shading.py
and replace lines
if material:
special_texture_found = False
for t in material.texture_slots:
if t and t.use and t.texture is not None:
if (t.texture.type == 'IMAGE' and t.texture.image) or t.texture.type != 'IMAGE':
validPath=True
else:
validPath=False
if(t and t.use and validPath and
(t.use_map_specular or t.use_map_raymir or t.use_map_normal or t.use_map_alpha)):
special_texture_found = True
continue # Some texture found
if special_texture_found or colored_specular_found:
# Level=1 Means No specular nor Mirror reflection
povHasnoSpecularMaps(Level=1)
# Level=3 Means Maximum Spec and Mirror
povHasnoSpecularMaps(Level=3)
with the following code from the updated add-on for Blender 2.8. Make sure that the identation level is the same as in the original file.
if material:
special_texture_found = False
for t in material.texture_slots:
if t and t.use and t.texture is not None:
if (t.texture.type == 'IMAGE' and t.texture.image) or t.texture.type != 'IMAGE':
#validPath
if(t and t.use and
(t.use_map_specular or t.use_map_raymir or t.use_map_normal or t.use_map_alpha)):
special_texture_found = True
continue # Some texture found
if special_texture_found or colored_specular_found:
# Level=1 Means No specular nor Mirror reflection
povHasnoSpecularMaps(Level=1)
# Level=3 Means Maximum Spec and Mirror
povHasnoSpecularMaps(Level=3)
The issue in the code is that the if-case if (t.texture.type == 'IMAGE' and t.texture.image) or t.texture.type != 'IMAGE':
doesn't have an else case where validPath
is set. If that case occurs, then validPath
isn't initialized which results in the error you're experiencing.