[SOLVED] Photoshop Tiff and Alpha channel

[oMeGa]

Hi guys! I've a problem with Photoshop CC 2015 and Octane v2.25-R4 c4d plugin.

First i try to search on this forum but without luck, and of course on octane pdf but don't speak to much on alpha channels. So...

I try a make a simple texture, essentially is a white background and some text in black, and want to use as a alpha channel for doing stuff on octane node manager.

Now.. i need to make the text as alpha, i have tried exporting in .png format without the alpha channel, and octane recognize alpha channel of the .png but when i switch the mode to float or normal it make rectangular boxes around the text??? And this is a second issue.

The first issue is i can't make a tif with alpha and let octane recognize it as an alpha image.

The workflow is:

Photoshop, White background, black text, then select the text and save as an alpha channel, save in .tif format without layers, and with export alpha channel checked. (Grey/8).

Then when i import the image in octane and switch the mode to alpha it simply doesn't work.

(I don't have provided any screenshoot for time-saving, but if u think is useful i can post it.)

Thanks guy, hope anyone can help me with this little issue.

[oMeGa]

After various trial and errors, i've found what is the problem, and want to share how i solved the problem.

The problem is 8bit image texture, i have used 8bit greyscale image and octane don't recognize alpha channel.

So i saved .tif from photoshop in 16bit greyscale and it works!!! Let's the alpha madness begins!!!

Hope this can help a beginner like me on this forum!

Cheers

[TonyBoy]

Great tip, thanks! The 8 bit trap is perfect for newbies because 8 bit is economical and the most common. I see where some displacement maps are best at 32 bit.