This question may sound a little dense, but I have a load of MT5 material files that I cannot seem to use. When I do I keep getting little yellow triangles on the screen. Am I missing something or doing something wrong? Any help would be appreciated.

Quote - This question may sound a little dense, but I have a load of MT5 material files that I cannot seem to use. When I do I keep getting little yellow triangles on the screen. Am I missing something or doing something wrong? Any help would be appreciated.

Sounds very odd, can you post a screenshot of this please.

As requested please find attached a screenshot of the problem.

Haven't really ever used the Simple view, but did find an explaination for you (P6 manaul p.229 or P7 manual p.196) :-

Quote - A Caution symbol (exclamation point in a triangle) will appear at any point when the
surface attributes you are working with are too complex to be edited in the Simple tab. For
example, this would be the case if a procedural shader node were attached to the diffuse
color input. Whenever the Caution symbol appears, it is an indication that you need to use
the Advanced tab for full access to this attribute’s configuration parameters. Click the
Caution symbol to switch to the Advanced tab.

Thanks a lot for your help, this explains everything.

Merry Christmas.