Strange rendering issue

[Mike Wright]

I have some extruded objects rendered with a basic image based RW texture.

 

When I render the scene lit using RW Realistic I get strange 'lines' down the objects like the paint has run!

 

These do not appear in OPENGL renders.

 

At first i thought it was some odd reflections but i removed the reflectance from the texture and the same occurred.

 

Any ideas as to what might be the cause?

 

VW Spotlight 2017, PC system

 

Example below:

 

 

Edited April 11, 2017 by Mike Wright

[bcd]

Check that the texture's Bump is set to None

[Mike Wright]

thanks.

 

just tried that, no change.

 

Also just taken the extrudes into a separate file, lit with a single infinite light and the problem persists so lighting within the original scene is not to blame.

 

Also tried rendering in Final Quality RW and the same occurs so indirect lighting is not to blame either.

[markdd]

I had this happen a while back. I think I solved it by importing the image as a png file having already removed the background in photoshop. You can then use the Alpha channel for when you create your image prop. 

[Mike Wright]

thanks, will give it a try.  They are currently TIFFs with a white background rather than alpha

[Rummelplatz]

png should work, tiff is mostly used for printing. otherwise jpeg is also an option.