Texture Compression in Advanced Render settings

Petra

I have mine at default.

To set those higher, would that result in better render quality for textures?

onix

I wonder if anyone knows what this compression thing does

On one forum I found an idea that it resamples textures depending on the camera distance

But I doubt that it will improve quality if you disable compression it is not like it can be noticed anyway

Petra

Thank you for the quick reply, onix :)

Anim

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threashold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

onix

Anim said:

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threashold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

 

This is self-evident but what triggers that compression anyway?  

 

Richard Haseltine

onix said:

Anim said:

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threshold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

 

This is self-evident but what triggers that compression anyway? 

The image size, that's what the threshold values are for.

marble

Richard Haseltine said:

onix said:

Anim said:

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threshold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

 

This is self-evident but what triggers that compression anyway? 

The image size, that's what the threshold values are for.

The image size or the texture resolution? 

Richard Haseltine

marble said:

Richard Haseltine said:

onix said:

Anim said:

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threshold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

 

This is self-evident but what triggers that compression anyway? 

The image size, that's what the threshold values are for.

The image size or the texture resolution? 

How are those different?

marble

Richard Haseltine said:

marble said:

Richard Haseltine said:

onix said:

Anim said:

Medium Threshold:

Every texture image with a resolution lower than what is set there gets no compression.

Medium Threshold to High Threshold:

Every texture image with a resolution between medium and high gets medium compression

Every texture image with a resolution above High Threshold gets max compression.

This is a functionality to reduce GPU vram usage. As long as there are textures falling into the thresholds they will be compressed to use less vram. E.g. if you set min. and max. to 8200 then only textures above that resolution will get compression. Because most textures are not "bigger" than 8192 pixels that means you more or less get no compression at all. In my tests I noticed better quality of hair textures with no compression - but the difference is not that big. On the other hand, without compression the vram consumption increases significantly and in heavy scenes causes the render to either fail or fallback to CPU:

 

This is self-evident but what triggers that compression anyway? 

The image size, that's what the threshold values are for.

The image size or the texture resolution? 

How are those different?

For me, the image size is what I set it to in the render settings ...

Richard Haseltine

OK, I mean the size of the texture image, not the final render image. It's the maps passed to the renderer, those which are above a threshold get that compression type before being passed over.

marble

Richard Haseltine said:

OK, I mean the size of the texture image, not the final render image. It's the maps passed to the renderer, those which are above a threshold get that compression type before being passed over.

Yep, I thought so but just wanted to make sure that the final image size had no bearing on what's being discussed here.