(04-08-2018, 11:42 PM)Friedslick6 Wrote: Presuming you're running on Windows:

• Install a copy of ImageMagick.
  
• Save the following to a batch file (.BAT extension) in the directory containing the .DDS textures:
  @CD /D %~dp0%@magick mogrify -format png *.dds@DEL *.dds
  
• Run the batch file and wait for it to convert the .DDS textures into .PNG.
  
• To optionally optimise each texture (reducing file size), download PNGOUT to the directory.
  
• Save the following to another batch file in the directory containing the new .PNG textures::
  @CD /D %~dp0%@FOR /R %%A IN (*.png) DO PNGOUT "%%A" "%%A" /y
  
• Run the batch file and wait for it to optimise the .PNG textures.
  

File extensions can be fixed in post by find-and-replace on the exported plaintext model
Changing the extensions inside of Blender can be done automatically with the assistance of this Python script I found, credit to Photox.
Copy the following into the "scripting" layout's code window within Blender, then press the "Run" button below it:

Code:

import bpy

# the main looping code snippet is modified from
# https://blender.stackexchange.com/questions/80773/how-to-get-the-name-of-image-of-image-texture-with-python

print('----------------------------------------')
print('Starting the replacer script....')

texture_list = []
count_replaced_files = 0

find_chars = 'dds'
replace_chars = 'png'

for obj in bpy.context.scene.objects:
    for s in obj.material_slots:
        if s.material and s.material.use_nodes:
            for n in s.material.node_tree.nodes:
                if n.type == 'TEX_IMAGE':
                    texture_list += [n.image]
                    #print(obj.name,'uses',n.image.name,'saved at',n.image.filepath)
                    if find_chars in n.image.name:
                        count_replaced_files += 1
                        old_name = n.image.name
                        new_name = n.image.name
                        new_name = new_name.replace(find_chars,replace_chars)
                        n.image.name = new_name
                        info_string = old_name + ' has been replaced with ' + new_name
                        print(info_string)
                        
print(str(count_replaced_files))
print('File were replaced')
print('Finished')
print('----------------------------------------')

#print(texture_list)

(09-01-2018, 06:44 PM)Demonslayerx8 Wrote: You can just use Noesis to convert the DDS files to PNG, won't cause any issue's at all.