Revit texture display anomalies

[msochacki]

I have been recently testing a numerous brick texture materials in autodesk Revit environment and found two anomelies/display issues which I would like to claryfiy and understand:

1) textures seem to display horizontal / vertical lines when orbiting the model if the image is not of square dimensions

2) texture of larger size display not sharply in close up views

Example one 

Below 3d view display same brick material with two different textures sizes (2025mm x 2100mm) and (2025mm x 1950mm).

The same textures start to display lines when the view is zoomed further away.

You can see vertical lines appear on the texture that has portrait ratio and horizontal lines appear on the texture of landscape proportions.

Conclusion: Is it best to make texture that is square! ??

See another example below. Two new sizes added of square ratio textures (2700mm x 2700mm) and (1350mm x 1350mm)  and display much better.

A closer look at the two square textures .... What I have noticed that smaller textures display much sharper when zooming close.

I have tested this on few other brick textures with similar results. Also actuall size of a file or fomat (.bmp , .jpg, .png) does not seem to be a factor in the described behaviour. I would like to understand what is causing the display of vertical /horizontal lines effect and also why size of texture affects sharpness.

[martijn_pater]

I think it always imports at 72dpi, so the larger the texture image the sharper it will be... ? the other stuff is just moire effect... ? not sure:)

[msochacki]

It's actually the contrary smaller the texture the sharper it is displayed. Almost like a graphic driver blurres the image or does not load it into detail it if its too large. 

[martijn_pater]

I don't think the smaller images are 'sharper' actually. I suppose it becomes more pixelated, thus showing less 'blurry' in the view...

[msochacki]

That's what exactly I would like to understand what happens to the image when it gets uploaded into Revit.

See another example. I have created two images of the same quality (150dpi) one large 2700 x 2700 pixels second small 675 x 675 pixels.

Then created two materials. Comparison in image quality in Revit below (large on the left small on the right). So if Revit processes image on upload (changes it's quality to 72 dpi) and most likely also resamples the image ( changes pixel count) which would explain why large texture becomes lower quality. What is the maximum/perfect size for the texture than?

[martijn_pater]

Seems to me, you are on the right track to tell me more about that... 🙂 Also wondering about the effects on rendering actually.

[Anonymous]

@msochackiDid you ever find the maximum/perfect size for a texture?

[msochacki]

Sadly I did not. No one has responded in terms of what's coded in API and how Revit transforms image that is uploaded to the Software.  All I know is larger /  better quality texture will not necessarily look better in Revit.