Sean Meighan

Software => Bugs in xLights/Nutcracker => Topic started by: Val Bennett on November 01, 2019, 01:46:13 PM

Title: Large pixel tree shows a horizontal seam in the middle
Post by: Val Bennett on November 01, 2019, 01:46:13 PM
We have a 32 string x 100 rgb pixels per string megatree model in our display. In the simulation, some effects appear to create a horizontal seam in the middle of the tree (spirals for instance - see attached pptx file). The tree is 360 degrees around. Other effects don't appear to create the seam  (plasma, butterfly for example). The 12- ribbon CCR tree does not do this with the same effect programmed. Does anyone know what we are doing wrong, or is it an issue with the program?
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Gilrock on November 01, 2019, 02:14:41 PM
All effects are rendered as if the model was a flat surface so when you wrap that flat surface into a circle there will be a seam.  The seam should be centered in the back of the tree.
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Val Bennett on November 01, 2019, 02:24:27 PM
Gilrock - that makes sense, but shouldn't the seam be a vertical one in the back?
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Gilrock on November 01, 2019, 02:59:43 PM
Yeah I didn't notice you had an attachment.  That is not the type of seam I was thinking of.  I'd do a Tools -> Package Sequence and post a zip file with that so we can figure it out.
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Val Bennett on November 01, 2019, 04:25:54 PM
Gilrock, here is the sequence package as you suggested.

Thanks for your help, let me know if I need to post any other info.
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Gilrock on November 01, 2019, 06:00:45 PM
Ok that's happening because you have a perfect 90 degree rotation parameter so the white and red pixels hit the exact same spots and blend.  If you drop a new Tree model you will notice we default that parameter to 3 to give the front strands a slight offset from the rear strands.  So make the Rotation 93 and it will look normal.
Title: Re: Large pixel tree shows a horizontal seam in the middle
Post by: Val Bennett on November 02, 2019, 10:43:02 AM
Thanks Gil, I believe that did the trick!