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Random black blob on terrain lightmaps [fix'd]
Posted: Tue Mar 31, 2015 12:03 am
by KittenIgnition
I've been messing around in Radiant again recently, and got back to my little test map. I don't remember ever having this issue before, but that doesn't matter as I have it now. There's a huge black spot over my terrain, and the same thing on a few other brushes in the same terrain cluster (I have a few terrain brushes func_group'd for more detailed shadows).
The shader for the grass is really basic:
Code: Select all
textures/landscape/fielddirtgrass01
{
// q3map_surfacemodel models/landscape/grass/fallforestgrassobj01.obj 96 .3 1.5 0.5 0 360 1
q3map_lightmapSize 2048 2048
q3map_lightmapBrightness 2.0
q3map_lightmapMergable
surfaceparm alphashadow
surfaceparm slick
{
tcgen lightmap
map $lightmap
rgbGen identity
}
{
map textures/landscape/fielddirtgrass01.tga
blendfunc filter
}
}
and I'm using Lunaran's ridiculous skybox from lun3dm5, but it happens also with more standard skyboxes. I dunno where to look for a solution, as this is the first time I've ever seen this that I can recall.
Re: Random black blob on terrain lightmaps
Posted: Tue Mar 31, 2015 12:05 am
by KittenIgnition
I'm, uh, really unlucky with these kinds of things. I don't know why "surfaceparm alphashadow" is there, and I don't know why I didn't check it earlier... but somehow that was the cause. And I found it within 30 seconds if making this topic, after having the issue for 3 days.
FML
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Tue Mar 31, 2015 1:22 am
by AEon
I noted that the act of trying to analyse and explain an issue to others usually helps to focus the own mind. Had that happen to me several times as well in the past few years...
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Tue Mar 31, 2015 1:32 am
by KittenIgnition
It also happens to me really often, but I don't catch it until I already send my message or make my post, thus causing some embarrassment. Not that it really matters, it's a bit annoying though.
Seriously though, why the hell does alphashadow cause this? It's friggin' weird. I know it shouldn't have been there, and its presence in the shader was an accident, but this basically means alphashadow casts its own shadow on itself, right? That's weird. And potentially cool.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Tue Mar 31, 2015 7:25 am
by Eraser
Same thing with programming. Sometimes you stare at an unsolvable issues for hours and then you ask someone to take a look at it and while you explain what's happening, you suddenly note your parentheses are incorrect
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Tue Mar 31, 2015 4:02 pm
by MKJ
it's called Rubber Ducking.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Wed Apr 01, 2015 6:20 am
by mrd
It's actually called a new pair of eyes.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Wed Apr 01, 2015 8:08 am
by Eraser
mrd wrote:It's actually called a new pair of eyes.
Nah, because it's your own eyes spotting the mistake without any input from the other person.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Wed Apr 01, 2015 8:43 am
by MKJ
Indeed, it's forcing yourself to go through it step by step.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Fri Apr 03, 2015 6:21 am
by mrd
Apparently I need a new pair of eyes.
Re: Random black blob on terrain lightmaps [fix'd]
Posted: Sat Apr 11, 2015 8:13 pm
by KittenIgnition
here is pic A of the map in its working stage and
pic B, if anyone was interested =D
If you aren't actually playing on the map, it really isn't that special to look at. It's not amazing even if you are on it though... It's just for experimenting and learning mainly.
lightmap ver of pic A and
pic B.
