Rendering A 32-but Tga

[Lukich]

Hi. I'm trying to render out a 32-bit targa. I understand that it's set in the Deep raster parameter of Mantra, but it only gives me access to 8 and 16-bit, plus a floating point. How do I set it to be 32-bit? Is it possible?

Thanks,

Luka

[edward]

I don't think there's such a thing as 32 bit per plane targa's. I think you mean 8 bit per component targa's that have RGBA components which gives your 32 bit per pixel. In Houdini, the number of bits refer to per component. so an 8 bit image means it has 8 bit's per plane which is 32 bits per RGBA pixel. A 16 bit image means it has 16 bits per plane which is a 64 bit per RGBA pixel, etc.

[Lukich]

I see. Thanks a lot, Edward.

[Lukich]

I have another small question. Is there a minimum size to a targa file? I alway thouht that they don't get smaller then 1.2 MB. However, I have rendered a sequence with the default mantra settings, except for teh size (set it to 720 by 480) and the targa size is somewhere around 100 KB. The picture looks fine, though. A lot of area is an alpha channel though - can this be the reason for a small file size?

tank_texture_lights_v1.127.rar

[sibarrick]

I think the tga format uses run length encoding, a simple but sometimes effect method of lossless compression. If you have a large frame with not much in it the file size could easily get down to 100kb.

[Lukich]

Thank you.