Sci-fi hotfix

Hi all,

Firstly thank you for all of the support for the Sci-fi DLC!
I wasn't sure how everyone would respond to the slightly wackier theme but I'm glad to see people enjoying the new decorations.

A summary of small fixes for the latest content:

• Fixed the Alien Plant pulsing wildly if placed on an elevated surface
  
• Improved Crater texture
  
• Fixed Craters in different areas of the level not updating when the floor texture is changed
  
• Fixed Craters loaded from a file getting stuck on their initial texture
  
• Fixed some issues on the splash screen

I'm aware of an issue with trains not saving their styles and carriages, I'll be working to fix that asap.