I’ve recently started to notice very long “Preparing scene data” phase when I hit render.
Even if the scene is not huge. I can’t figure out what’s the deal.
I’m attaching model of the house I’m working on. I’ve completely cleaned the scene of all objects that might make the prep phase longer, very little improvement.
I get 20s of prep time on my six core machine, 64GB ram.
Can someone else try and report if he gets long times as well?
I’m using last version of corona.
Now I’ve tried to delete all the materials from the scene and the prep time fell to about 1s.
Did anybody else had similar issues?
But If I simply try to override it with a white material it still doesn’t work. I have to phisicaly delete each and every material from my scene.
Any idea how to find the error?
Thank you both!
I guess there is an issue with the size of the texture. I have a texture of about 130MB in size. When I delete this texture I get way faster prep phase.
Are you guys usually using JPG or TIFF for textures maps? Does it influence speed?
Jpg only for diffuse maps and at max quality if I don’t have anything else. Anything greyscale is in a 16-bit format except for very hard alphas, there I sometimes use Alpha 1 images. My preference lies with pngs unless I need even more bits.
edit: you should put your images into a corona bitmap shader. that affects speed positively.
I’ve done some test regarding the “Corona Bitmap” texture slot.
And I haven’t noticed any drastic time improvements.
I’ve also tried saving files in TIF and PNG. I’ve reduced image sizes.
Nothing really helps, I still get 15second of “Preparing scene data” which is IMO too long.
When I delete all the textures it’s 1 second or so.
Whenever I tried Corona Bitmap shader… its shows black texture and in preview green yellow gradient and renders black.
Is there any other setting required…?
