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Answered

Input texture for sbsar only 8 bits ?

Forum|Forum|4 years ago
February 14, 2022
2 replies
1405 views

Hello,

I am using the substance in unity plugin, and I would like to provide a position texture input to the graph to create a perlin noise.

It seems that even if I input a 16 bits texture the graph only reads it as 8 bits.

In substance designer we can only set the output format and not the input.

Is there a way to tell the graph that we want the input texture to be 16 bits ?

Thank you very much !

This topic has been closed for replies.

Correct answer Luca Giarrizzo

Hello,

Thank you for your interest.

- The output size for the nodes are absolute 1024x1024 and the graph is parent size x1.

- The resolution of the input texture in unity is 2048x2048 16 bit per channel

- The graph resolution in unity is 1024x1024 with no compression ( raw )

Hello Neagu,

Thank you for these additional details.

After further assessment, it appears the issue indeed lies in the Susbtance in Unity integration.

The pixelated look is a result of quantization of the position map, which limits precision and results in smooth gradients being flattened into stepped squares. The plugin is likely converting the RGBA16 input into RGBA8.

This issue is now reported to the integrations team. I appreciate your patience in the meantime and thank you for your valuable help!

Best regards.

W

Wojciech22936854i3uo

Participant

Have this issue been resolved yet?

S

Shwetha23063442qtvs

Community Manager

Hi,

Are you still encountering this issue? If so, could you please share some examples or repro steps?

Thanks!

M

Mark_Edwards

Inspiring

Any update on this I'm getting the issue still with latest substance designer and unity when trying to use a position map to drive a substance graph. Done all the usual workaround stuff like forcing it to 16bit forcing the parent to a larger size, forcing all the nodes to run at 16bit and 2048 etc. wondering if i've missed a setting somewhere or if it's broken still. thanks!

but in unity looks like its 8bit / 512px texture

Luca Giarrizzo

Community Manager

Hello @Neagu21988200u3ot,

It is likely that somewhere in the graph, the data is converted to 8-bit by a node, and this change impacts data downstream.

Nodes which take multiple inputs, such as the Blend node, have a primary input marked with a small dot inside the input connector. The primary input will drive the resolution and bitdepth of all parameters which inheritance method is set to Relative to input.

This is an easy trap to fall into, so I recommend checking the graph for any changes happening to the data from the input nodes down. I hope this is helpful!

Best regards.

Luca Giarrizzo | Quality Engineer - Substance 3D Designer | Adobe

N

Neagu21988200u3otAuthor

Participant

Hello @Luca Giarrizzo , thank you for the fast answer.

Here I have a graph with everything in 16 bits.

I create 2 .sbsar , one with the position texture included to designer, and one with the postion texture as an input in unity and I get a different result.

Note that both output texture in unity are on "point" and raw so no compression is made .

Luca Giarrizzo

Community Manager

Hello,

Thank you for the additional informations.

Based on the third image in your reply, this appears to be a resolution issue rather than a bitdepth issue. Please check the following:

What inheritance method is set on the Output size property of the graph and its nodes: Absolute, Relative to parent, Relative to input?
What is the resolution of the input texture passed in Unity?
What is the graph's parent resolution set in Unity?

Best regards.

Luca Giarrizzo | Quality Engineer - Substance 3D Designer | Adobe

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