Erratic scrolling type 48 Texture Scroll Left and 85 Texture Scroll Right

[ryg]

I have made a very big map. Vertices were up to 51649 when Doom Builder reported "Failed to complete operation: maximum number of vertices reached" when loading the map. While the map was still playable there was one problem: the erratic behaviour of Linedef actions scrolling type 48 Texture Scroll Left and 85 Texture Scroll Right. I am running the WAD with PrBoom plus. Some textures on lines with type 48 or 85 were scrolling and some were not. I have now reduced the number of vertices to 45755 and I don't get the warning message anymore.  The erratic behaviour stayed, and worse, after I removed all the type 85 actions, several textures still scroll although set to type 0. Go figure. I have erased and drawn anew several lines but it did not solve the problem. How do I correct this?

Edited December 13, 2017 by ryg

[ryg]

On ‎12‎/‎12‎/‎2017 at 2:36 PM, ryg said:

I have made a very big map. Vertices were up to 51649 when Doom Builder reported "Failed to complete operation: maximum number of vertices reached" when loading the map. While the map was still playable there was one problem: the erratic behaviour of Linedef actions scrolling type 48 Texture Scroll Left and 85 Texture Scroll Right. I am running the WAD with PrBoom plus. Some textures on lines with type 48 or 85 were scrolling and some were not. I have now reduced the number of vertices to 45755 and I don't get the warning message anymore.  The erratic behaviour stayed, and worse, after I removed all the type 85 actions, several textures still scroll although set to type 0. Go figure. I have erased and drawn anew several lines but it did not solve the problem. How do I correct this?

Problem solved. The erratic behaviour was due to too many sidedefs (over the limit of 256x256=65536). I reduced the number of sidedefs to just below the limit and the engine behaved correctly.