Displacement map error

[neiwei845458454]

Hi,

Just say there are very obvious, the octane render displacement map rendering like pixel block, the other engine of renders is right, use a 4K texture. How can i do?

octane-Displacement.png

this is not good,why?

FStorm-Displacement.png

this is good.

the file:

max2016 file.rar

thanks for your help.

Best,
Alxen

[bartolos]

Hi,
It looks like you are using 8-bit texture for displacement (either the texture itself is an 8bit channel depth file, or it is used as 8bit in memory) please check it.

[paride4331]

Hi neiwei845458454,
here attached screenshots: same scene using 8-bit and 16-bit textures.
Regards
Paride

[neiwei845458454]

Hi neiwei845458454,
here attached screenshots: same scene using 8-bit and 16-bit textures.
Regards
Paride

Hi Paride,
Thank you for your help. Does the core of octane not use 8-bit bitmap?
But my bitmap all 8-bit bitmap, How can I convert to 16-bit bitmap?

[abstrax]

Hi neiwei845458454,
here attached screenshots: same scene using 8-bit and 16-bit textures.
Regards
Paride

Hi Paride,
Thank you for your help. Does the core of octane not use 8-bit bitmap?
But my bitmap all 8-bit bitmap, How can I convert to 16-bit bitmap?

Yes, Octane displacement does work with 8-bit textures, but often results in visible steps since the displacement map isn't further filtered. Fstorm does seem to filter it and thus reducing/removing the discretisation but also blurring away some details. Could you post/send me the displacement map image so we can have a look and try to reduce the discretization steps? Thanks.

In the meantime: If you don't have the displacement map as 16bit image, you can convert it to 16bit using Photoshop and then try to apply some filter like a slight gaussian blur or surface blur.

[neiwei845458454]

Hi neiwei845458454,
here attached screenshots: same scene using 8-bit and 16-bit textures.
Regards
Paride

Hi Paride,
Thank you for your help. Does the core of octane not use 8-bit bitmap?
But my bitmap all 8-bit bitmap, How can I convert to 16-bit bitmap?

Yes, Octane displacement does work with 8-bit textures, but often results in visible steps since the displacement map isn't further filtered. Fstorm does seem to filter it and thus reducing/removing the discretisation but also blurring away some details. Could you post/send me the displacement map image so we can have a look and try to reduce the discretization steps? Thanks.

In the meantime: If you don't have the displacement map as 16bit image, you can convert it to 16bit using Photoshop and then try to apply some filter like a slight gaussian blur or surface blur.

Thank you for your help. I have post the displacement map image by attach file. Please try to reduce the discretization steps. big Thanks.

pkgkG_4K_Displacement.jpg

pjuc0_4K_Displacement.jpg

[paride4331]

Hi neiwei845458454,
for best results, you should use 16bit original file.
Use maps from 8bit to 16bit implies a simple interpolation that can not give better results.
I attached the displacement maps n the best possible result.
Regads
Paride

[oguzbir]

When you have only an 8 bit of a height texture.
turn it to 16 bit.
then apply some blur until those bandings are not visible.

Option to have filtering (8bit to 16 bit conversion and some blurring) inside Octane might be good to have.

[neiwei845458454]

Hi neiwei845458454,
for best results, you should use 16bit original file.
Use maps from 8bit to 16bit implies a simple interpolation that can not give better results.
I attached the displacement maps n the best possible result.
Regads
Paride

how do you do to convert 8bit to 16bit ?
Thank you

[paride4331]

Hi neiwei845458454,
to obtain 16 bits files you should use
Phothoshop blur filter to remove artifacts in displacement:
filter> blur> gaussian blur
convert to 16bits:
image> mode> 16 bits / channel
Save.
Regards
Paride