RPRBLND-1623: Using the "stepcount" setting (i.e frames per step) causes long motion blur. (#229)

PURPOSE

Blender has a setting for “step count” which would set frame step between animation. It seems for example if this is set to 5 then motion blur is 5x more blurred than should be.

EFFECT OF CHANGE

Fixed issue with long motion blur when step count (frames per step in animation) > 1.

Author: bnagirniak

src/rprblender/engine/engine.py

@@ -194,7 +194,7 @@ def set_motion_blur(rpr_object, prev_matrix, cur_matrix):
             return
 
         cur_frame = depsgraph.scene.frame_current
-        prev_frame = cur_frame - depsgraph.scene.frame_step
+        prev_frame = cur_frame - 1
 
         # set to previous frame and calculate motion blur data
         self._set_scene_frame(depsgraph.scene, prev_frame, 0.0)