strange behavior in GISD again...mmm?

[Dune]

I found that with GISD checked (all default settings, so basic filter, no DOF), the dreaded lines were back (third part). No GISD, no lines (second part). But the strange thing is that the lines were already there before GISD was computed (see the part of this screendump with the black patches still to be rendered; first part).
Basic object test with an alpha opacity layer, no translucency, this time unpremultiply unchecked.

And a question that popped up before this happened; what vertices can TG handle best, triangles or squares? These hides were put through Poseray, so are triangles.

[j meyer]

Can't help with the GISD thing,sorry.
As for your other question:vertices are the points,what you are talking of
are the faces or polygons and as far as I know TG handles them internally
as triangles (for rendering) even when your obj files has quads.So as mentioned
somewhere else when you bring in an all quad obj and save it as tgo it will be
converted to triangles.(UVs are still intact on reimport,which was your question
back then).
Maybe Matt can be more explicit and specific.

[Matt]

I found that with GISD checked (all default settings, so basic filter, no DOF), the dreaded lines were back (third part). No GISD, no lines (second part). But the strange thing is that the lines were already there before GISD was computed (see the part of this screendump with the black patches still to be rendered; first part).
Basic object test with an alpha opacity layer, no translucency, this time unpremultiply unchecked.

It's probably the same bug as this:

http://www.planetside.co.uk/forums/index.php/topic,17186.0.html

(Issue #539 on the alpha site)

Some GISD work is done on each bucket that shows up during rendering; it doesn't all happen at the end. GISD is a combination of some per-bucket work and some work on the final image.

Regarding quads vs. triangles, Terragen converts quads to triangles before rendering. However, there are two ways a quad can be turned into triangles, and Terragen might not choose the way you would prefer for each triangle. This might be an issue, or it might not. If you always work with triangles you have more control over the result.

Matt

[Dune]

Thanks for the explanation, guys. Some knowledge again.