Skindigo Displacement tests
Skindigo Displacement tests
So, I dived in a started some testing to see if I can figure this out. and, well, I haven't, but I did a few tests to try and get a very ballpark idea of where to start.
I borrowed the mat and the d_map from maxwell
anyways, I wanted to start with something that had been proven, even if it is in another renderer.
So, first is the preview.
No Subdiv, and Dis value at .18
see file comments for each pic.
what I don't understand is that I get no displacement in the actual model render, but when i bump up the Dis. value, it seems to raise the whole mesh toward the camera, instead of displacing the actual material???
Does there need to be some sort of anchor mesh that this bases itself off of?
I will resize images if needed.
I borrowed the mat and the d_map from maxwell
anyways, I wanted to start with something that had been proven, even if it is in another renderer.
So, first is the preview.
No Subdiv, and Dis value at .18
see file comments for each pic.
what I don't understand is that I get no displacement in the actual model render, but when i bump up the Dis. value, it seems to raise the whole mesh toward the camera, instead of displacing the actual material???
Does there need to be some sort of anchor mesh that this bases itself off of?
I will resize images if needed.
- Attachments
-
- No Subdiv
Dis. @ .2 - No_sub_d.2.png (536.73 KiB) Viewed 4040 times
- No Subdiv
-
- No Subdiv
Dis. @ .18 - No_subdiv.png (537.55 KiB) Viewed 4040 times
- No Subdiv
-
- Max Subdiv@ 1
both thresholds at .1
Dis. @ .18 - subdiv_1.1.1.png (531.79 KiB) Viewed 4040 times
- Max Subdiv@ 1
-
- Max subdiv and thresholds @ 1
DDis. @ .18 - subdiv_1-1-1.png (526.82 KiB) Viewed 4040 times
- Max subdiv and thresholds @ 1
-
- preview
no Subdiv
Dis. @ .18 - bricks_with_grasspreview.png (464.06 KiB) Viewed 4041 times
- preview
- kwistenbiebel
- Posts: 496
- Joined: Sat Jan 27, 2007 12:31 am
I got this to work
with max Subd at 8
PT -1
CT -1
Dis @ .12
but, change anything or try this with a different mat and things go all wonly again.
i tried this on a wall instead of the ground, no dice. (not sure why that would make a difference)
Is there a correlation between the size of the mesh and the values of the parameters?
not sure if a default is possible, hopefully some more people will try out some tests.
it is fun though, but also frustrating, has anyone found a thread or link explaining what each of the parameters does?
with max Subd at 8
PT -1
CT -1
Dis @ .12
but, change anything or try this with a different mat and things go all wonly again.
i tried this on a wall instead of the ground, no dice. (not sure why that would make a difference)
Is there a correlation between the size of the mesh and the values of the parameters?
not sure if a default is possible, hopefully some more people will try out some tests.
it is fun though, but also frustrating, has anyone found a thread or link explaining what each of the parameters does?
- Attachments
-
- 8_-1-1.png (744.11 KiB) Viewed 3948 times
- kwistenbiebel
- Posts: 496
- Joined: Sat Jan 27, 2007 12:31 am
Looks nice....but oh boy, this displacement feature seems so difficult to control
Last edited by kwistenbiebel on Thu Jun 12, 2008 2:52 am, edited 1 time in total.
- kwistenbiebel
- Posts: 496
- Joined: Sat Jan 27, 2007 12:31 am
It's actually not as hard as you think. The most important parameter is the Max Number of Subdivisions which determines the 'resolution', 'fineness', or 'accuracy' of the displacement and the texture 'b' value (Gain in SkIndigo). This is not much different than Bump mapping.kwistenbiebel wrote:Looks nice....but oh boy, this displacement feature seems so difficult to control
The more complicated parameters are the 'curvature threshold' and the 'pixel threshold'. I might remove these from the SkIndigo interface if I can find some good default values. The thing to remember about these two values is that you don't NEED to ever change them. AFAIK, the main purpose of these parameters is to optimize the subdivision to save memory.
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