What file formats are accepted?
When uploading to My Paints or the Showroom, you can upload a 2048×2048 or 1024×1024 TGA or PNG file.
When exporting your painted template from your painting software (Photoshop or GIMP or similar), ensure you save TGA files as 24-bit (no alpha channel, used most commonly) or 32-bit (if alpha-channel transparency is used) with RLE compression enabled for best results.