Octane Scatter shader problem

[ValentinMoebs]

Hello all,

This is my first post on this forum, but I'd like to already thank everyone on here as this place has been an indispensable resource to learn Octane.

I'm using R20 and Octane V4.02.1.

The problem I'm encountering is fairly strange, and I don't feel familiar enough with how Octane Scatter works to outright call it a bug. To showcase the problem, I've prepared two identical planes which serve as distribution surfaces for two Octane Scatter objects. These Octane Scatter objects are identical except for the image map used as a shader to control distribution. Each time, the plane has an assigned material in which the diffuse map is the same as the one used to control Octane Scatter distribution. The small red spheres are the objects that are instanced by Octane Scatter.

Here is the first case :



And here is a screenshot of the corresponding Octane Scatter settings :



Here is the second case :



And corresponding settings :



I think that the expected behavior in the first case would be to have both the grey and white areas entirely covered with instances, but only the grey area is covered. In the second case, expected behavior would be to at least have the grey area covered in instances. Does anyone here have an explanation or a solution for this ?

Many thanks in advance !

- Valentin

[bepeg4d]

Hi Valentin,
have a look at this solution with two Scatter objects, with the same distribution map, but with different Count, and Min/Max values, to restrict the clones on specific color/zone:

ciao Beppe

[Gleitfrosch]

But wouldn't it make sense to be able to control the number or even the density of the objects ? This would be helpful for many purposes...

[TonyBoy]

But wouldn't it make sense to be able to control the number or even the density of the objects ? This would be helpful for many purposes...

It looks like the "number" is controlled by the "Count" which also controls the "density" (20 is 2X 10) in a restricted area.

[Gleitfrosch]

But wouldn't it make sense to be able to control the number or even the density of the objects ? This would be helpful for many purposes...

It looks like the "number" is controlled by the "Count" which also controls the "density" (20 is 2X 10) in a restricted area.

Yes exactly, but I meant that the number can be controlled by the gray gradient. For example: Black color no dots, gradient to white color with many dots.

For example, if you really want to bring realistic condensation onto a bottle, it would be a huge advantage to control small and large drops better. At the moment this is unfortunately not possible...

[TonyBoy]

How about deploying the two sizes on two scatter objects? I encountered a similar control problem with Forester that was solved with two scatter objects with two different plants.