Please link all sources, to the picture and information page, so the usage license can be seen. Here is the correct link for the humpback whale. https://en.wikipedia.org/wiki/Humpback_whale#/media/File:Humpback_Whale_underwater_shot.jpg

Please add remaining source links to your description.

The lightning is an illustration and can not be used.

From the guidelines: 5.6. 3D Renders or Illustrations as Source:
Using other people's 3D renders or illustrations (even with permission and no matter in which form they are offered) creates a false impression of your artwork. So 3D renders or illustrations can not be used as sources, unless they are entirely created by yourself. Only acceptable non-illustration brushes and clip art may be used, but you need to mention them as a source too. Don't use an image that has been altered by the source owner nor an entire work created by someone else.

Please read: http://www.pxleyes.com/courses/guide/

Thank you, most sources are ok now, in your description No. 14 Buildings 2 doesn't go to an image. Can you please fix this.

Thanks a lot, I live in Florida... Yipe Yipe Yipe! hehehe Good luck author

Thank you

Beautiful colours. like it