It sounds like it's trying to invert a matrix that's not invertable.
For example [[0, 1], [0, 2]] is non-invertible because when you multiply
it by something, all the coefficients of one of the dimensions are 0.
In transform land, I'd think the most common cause of this would
similarly be a scale factor of 0 on something in the scene. For
example, if you had an object scaled to zero, and (somehow) the shader
on it is being called and is trying to do a computation in world space.
Then it would need to invert the object transform and wouldn't be able
to. My best guess would be an object scaled to (0, 1, 1) or something
similar (such that it's flat and can therefore still be hit by rays).
But it could also be something much weirder than this.
-Andy
Steven Caron wrote:
I have a nice new Mental Ray warning :) i have only seen this in 5.11
#INFO : PHEN 0.2 warn 052017: mi_matrix_solve: A is singular
anyone have any ideas?
Steven
---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi
